Spectrum Classes
1.State the principle of conservation of angular momentum and explain its applications.
2.Define radius of gyration
3.Establish equation of continuity of an ideal liquid flow
4.Explain the variation of acceleration due to gravity with (a) altitude (b) depth
5.State Kepler’s laws of planetary motion
6.Define escape velocity and derive an expression for the escape velocity of a body on the surface of earth.
7.State theorem of perpendicular axis and the theorem of parallel axes.
8.Show that the oscillations of a simple pendulum are simple harmonic.
9.What are beats? How are they produced?
10.What is Doppler Effect?
11.State Carnot’s theorem.
12.Describe Carnot’s cycle. (Draw graph)
13.State the three laws of thermo dynamics (Zeroth law, first law and second law)
14.Apply I law of thermodynamics to (a) isothermal process (b) adiabatic process
15.Derive an expression for the work done in an isothermal process
16.Find the angle of projection for a projectile motion whose range R is 4 times the maximum height H.
17.The airplane shown is in level flight at an altitude of 1 km and a speed of 200 km/h. At what distance ‘S’ should it release a heavy bomb to hit the target X? Take g = 10 m/s2.
18.At what temperature is the Fahrenheit scale reading equal to half that of the Celsius scale?
19.What is a simple harmonic motion? State its characteristics.
20.What is capillarity? Derive an expression for capillary ascent.
21.Define surface tension.
22.Derive an expression for velocities after collision when two bodies undergo perfectly elastic collision in one dimension.
23.State triangle law of vector addition. Find out the angle between the resultant vector and the vector A when two vectors A =3m is acting towards east and vector B=4m is acting towards the north east.
24.Prove work-energy theorem for a variable force.
25.The moments of inertia of two rotating bodies A and B are IA and IB (IA > IB) and their angular momenta are equal. Which one has greater kinetic energy?
26.Derive an equation for the work done in an isothermal process and draw the P-V indicator diagram.
27.Deduce an expression for the total energy of a system executing S.H.M. Draw the energy curve.’
28.What do you mean by standing wave? Deduce an expression for the nodes and antinodes of a standing wave. Write down the positions of nodes and antinodes.
29.Friction is a necessary evil, comment. Mention some methods of reducing friction.
30.State Bernoulli’s principle. Deduce an expression for the volume of the liquid flowing per second through the wider tube of a venturi meter.
31.What do mean by damped oscillation?
32.What is resonance in oscillations?
33.What is the work done by the force of gravity on a satellite moving round the earth? Justify youranswer?
34. A light body and a heavy body have the same momentum which of the two bodies will have greater kinetic energy?
35.When is work done by the force is negative? Give condition for work to be positive?
36.Define one newton.
37.Distinguish between free, forced, and resonant oscillation with illustration.
38.Explain displacement, velocity, acceleration, and time period of a simple harmonic motion. Find relation between them.
39.State and explain superposition of waves.
40.Discuss the characteristics of stationary waves.
41.Explain the need of banking of tracks.
42.Explain why a gas has two specific heats?
43.The momentum of a body increases by 20%. What is the percentage increase in kinetic energy?
44.Calculate the energy spent in spraying a drop of mercury of 1cm radius into 106 droplets, all of same size. Surface tension of mercury is 55´10-2 Nm-1.
45.From kinetic theory of gas, find an expression for pressure exerted by gas on the walls of container.
46.Define orbital velocity of a satellite and derive an expression for orbital velocity.
47.Derive Stoke’s law by the method of dimensions.
48.Why does a freely falling body experience weightlessness?
49.Derive an expression for the apparent weight of a person in a lift when (a) the lift is moving up with acceleration (b) moving down with acceleration (c) moving up with acceleration (d) moving down with deceleration (e) moving up or down with constant velocity.
50.State Hooke’s law of elasticity. Draw stress vs strain for a wire subjected to gradually increasing tension and explain the various points of the curve. (Elastic region, proportional limit, elastic limit, plastic region, yield point and breaking point)
51.State Torricelli’s theorem and prove it. (Derive an expression for velocity of efflux)
52.Define thermal conductivity.
53.Explain the principle and working of carnot refrigerator.
54.Show that Cp is greater than Cv
55.Distinguish centre of mass and centre of gravity.
56.What are geostationary satellites?
57.Define Young’s modulus, bulk modulus and rigidity modulus.
58.State Pascal’s law and explain any one application. (Hydraulic brakes, hydraulic lift, hydraulic press)
59.Derive the relation L=I for a rigid body
60.Show that it is easier to pull a lawn roller than to push it.
Er.Shyam Pachori
CL 157 D.D Nagar
Mob.9039803981
Thursday, 19 January 2017
Class 11 Best Questions 2017
Saturday, 14 January 2017
Sound Class 9 Test
Spectrum Classes
Test Topic : Sound Class IX
Time: 1:30 hrs Max Marks: 40
Note : MCQ’s are of 1 marks each .
1. Wavelength of sound wave has units :-
(a) metres (b) metres/sound (c) (metres)2 (d) meters/second2
2. Light is a (a) Longitudinal wave (b) Transverse wave (c) Both (d) None
3. In compression, pressure density is
(a) High (b) Less (c) Remains same (d) May be a) or b) depending upon disturbance
4. Frequency of ultrasonic sound wave is
(a) Greater than 20 HZ (b) Greater than 20,000 HZ (c) Greater than 2 HZ (d) Greater than 2 MHZ
5. A sound wave travels from east to west, in which direction do the particles of air move?
(A) East – west (B) North - south (C) Up and down (D) None of these
6. In which medium sound travels faster ?
(A) Solid (B) Liquid (C) Gas (D) None of these
7. What is the name of short duration wave? (A) Pulse (B) Frequency(C) Time period(D) Velocity
8. What is the velocity of sound in water at room temperature?
(A) 1500 m/s (B) 330 m/s (C) 1500 km/s (D) 330 km/s
9. The unit of quantity on which pitch of the sound depends is :
(A) Hertz (B) metre (C) metre/second (D) second
10. The unit of quantity on which loudness of found depends is :
(A) metre (B) Hertz (C) metre/second (D) second
11. Nature of sound wave is :
(A) transverse (B) longitudinal (C) electromagnetic (D) seismic
11. Pitch of high frequency sound is :
(A) high (B) low (C) zero (D) infinite
12. Voice of a friend is recognized by its :
(A) Pitch (B) quality (C) Intensity (D) velocity
13. Sound waves in air are : (A) Longitudinal waves (B) Radio waves(C) Transverse waves(D) Electromagnetic waves
14.Difference between Travel and propagate is ………………………………..
15. Differentiate between longitudinal and transverse wave? [2]
16. Define the terms:- 1) Wavelength 2) Frequency [2]
17. An underwater device directs ultrasounds of frequency 75 KHZ towards water surface. What is the wavelength of sound in the air above the water surface and what is its frequency? Speed of sound in air = 340m/s. [2]
18. What is an echo? Name two areas of its application? [2]
19. What happens when sound travels in air? [3]
20. Establish the relation for a wave that velocity = frequency X wavelength. [3]
21. When a wave travels from one medium to another, the wavelength changes but
not the frequency. The wavelength of sound disturbance 30 cm in air and of the
wave velocity is 340 m/s. What will be the wavelength of this disturbance in
Helium & water? The speed of sound in helium is 970 m/s and 1450 m/s in water? [3]
22. Sound waves of wavelength λ travel from a medium in which its velocity is v m/s
into another medium in which if velocity is 3 v m/s. What is the wavelength of the
sound λ in the second medium [3]
23.Explain working of Sonar with diagram .[3]
24.Explain working of Human ear with diagram .[3]
Er.Shyam Pachori
CL 157 D.D Nagar Gwalior
Mob.: 9039803981
Sound Class 9 Numericals
"Om Sai Ram "
SPECTRUM CLASSES
1. A person observes the smoke from a gun 1.4 sec before he hears the bang. If the gun is 476 m away from the person, find the speed of sound? Ans: the speed of sound = 476 1.4 = 340m/s
2. A person standing near the cliff fires the gun and heard the echo after 1.5 sec. If the speed of sound in air is 340m/sec, how far is person from the cliff?
3. A sound wave of frequency 5000 Hz travel in air with speed of 350m/sec. Calculate the wave length.
4. If you hear thunder 7sec after you see he lightening, how far you from the lighting
5. A bat emits ultrasonic wave of frequency 30 Khz..If its speed is 350m/s and bats hear its echo after 0.6 sec after emitting the , find how far is bat from obstacle .
6. Meera is standing between two hills. She shouted loudly and hears first echo after 0.5 sec and second echo after 1 sec. what is distance between two hills?
7. If 2000 ripples produced in 5 sec in a pond find time period and frequency of ripples formation.
8. A man standing in a valley between two parallel mountains fires a gun and hears echo at an interval of 2 s and 3.5 s. What is (a) The distance between two mountains (b) the location of the man with respect to the mountain?
9. Calculate the wavelength of a sound whose frequency is 220 Hz and speed is 440m/s in a given medium.
10. A body is vibrating 6000 times is 1 minute. If the velocity of sound in air is 360 m/s, find (i) Frequency in Hz ` ```(ii) wavelength of sound.
11. An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source? .
12. A stone is dropped from a 500 m tall building into a pond. When is sound splash heard? Given g =10 m/s2 , speed of sound = 340 m/s.
13. A source of wave produces 40 crests and 40 troughs in 0.4sec .Find the frequency of the wave. Ans : As one crest and one trough together make a wave produces 40 crests and 40 troughs is equal to 40 waves. So the source produces 40 waves per second so 40 Hz is the frequency.
14. Water wave enter a dock at a rate of 120 crests per minute. At the dock are 2 poles 12 m apart from each other. a worker watches a particular wave crest pass from one pole to another in 4s.what is the frequency of the wave? Ans: Frequency is the number of waves crossing a referring point, As Water wave enter a dock at a rate of 120 crests per minute f = 120/60 = 2 Water wave enter a dock at a rate of 120 crests per second. So the frequency is 2 Hz. 15. A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Er.Shyam Pachori
CL 157 D.D Nagar
Mob.: 9039803981
SPECTRUM CLASSES
1. A person observes the smoke from a gun 1.4 sec before he hears the bang. If the gun is 476 m away from the person, find the speed of sound? Ans: the speed of sound = 476 1.4 = 340m/s
2. A person standing near the cliff fires the gun and heard the echo after 1.5 sec. If the speed of sound in air is 340m/sec, how far is person from the cliff?
3. A sound wave of frequency 5000 Hz travel in air with speed of 350m/sec. Calculate the wave length.
4. If you hear thunder 7sec after you see he lightening, how far you from the lighting
5. A bat emits ultrasonic wave of frequency 30 Khz..If its speed is 350m/s and bats hear its echo after 0.6 sec after emitting the , find how far is bat from obstacle .
6. Meera is standing between two hills. She shouted loudly and hears first echo after 0.5 sec and second echo after 1 sec. what is distance between two hills?
7. If 2000 ripples produced in 5 sec in a pond find time period and frequency of ripples formation.
8. A man standing in a valley between two parallel mountains fires a gun and hears echo at an interval of 2 s and 3.5 s. What is (a) The distance between two mountains (b) the location of the man with respect to the mountain?
9. Calculate the wavelength of a sound whose frequency is 220 Hz and speed is 440m/s in a given medium.
10. A body is vibrating 6000 times is 1 minute. If the velocity of sound in air is 360 m/s, find (i) Frequency in Hz ` ```(ii) wavelength of sound.
11. An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source? .
12. A stone is dropped from a 500 m tall building into a pond. When is sound splash heard? Given g =10 m/s2 , speed of sound = 340 m/s.
13. A source of wave produces 40 crests and 40 troughs in 0.4sec .Find the frequency of the wave. Ans : As one crest and one trough together make a wave produces 40 crests and 40 troughs is equal to 40 waves. So the source produces 40 waves per second so 40 Hz is the frequency.
14. Water wave enter a dock at a rate of 120 crests per minute. At the dock are 2 poles 12 m apart from each other. a worker watches a particular wave crest pass from one pole to another in 4s.what is the frequency of the wave? Ans: Frequency is the number of waves crossing a referring point, As Water wave enter a dock at a rate of 120 crests per minute f = 120/60 = 2 Water wave enter a dock at a rate of 120 crests per second. So the frequency is 2 Hz. 15. A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Er.Shyam Pachori
CL 157 D.D Nagar
Mob.: 9039803981
Class 12 Cbse Board Best Questions
"Om Sai Ram "
SPECTRUM CLASSES
BEST QUESTIONS FOR CLASS XII BOARD PAPER 2017
Optics (ray and wave optics 7 + 7=14 marks)
Q.1 Derive expression for magnification of compound microscope , Astronomical telescope and solve numerical on them.
Q.2 Explain cassegrain telescope with diagram , difference between reflector and reflecting type telescope
Q.3 Derive expression for lens maker formula , what is effect on F when we dip in water , a high density medium , cut horizontally and vertically.
Q.4 Explain TIR with its conditions , working of optical fiber , porro prism and numerical on it.
Q.5 Derive thin lens formula , mirror formula , and solve numericals of combination of mirror and lens.
Q.6 Explain Huygens principle , prove law of reflection and snell’s law by it , explain wave front and its types.
Q.7 Define coherent sources and condition for sustained interference , explain youngs double slit exp , with derivation of fringe width and logical question on it with numerical.
Q.8 Explain brewester’s law , malus law with numerical , polarized light and prove that light is a transverse wave , how goggle polarized light.
Q.9 Explain diffraction with its condition , difference between interference and diffraction , explain diffraction by single slit and numericals on it .
Q.10 Explain Prism Formula , its graph , condition of minimum deviation , numerical on it , dispersion , why sky blue . how rainbow form .
Modern Physics(dual nature , atom and nuclei, semiconductor , communication 3+7+7+5=22)
Q.11 Explain photoelectric effect , threshold energy , threshold frequency and its all graph given in ncert.
Q.12 Explain Einstein photo electric equation and Emissions of photo Electron s .
Q.13 Derive expression for wavelength of debroglie wave for matter wave and electron and logical question on it and prove it by using davission germer exp.
Q.14 Explain Rutherford model , distance of closest approach with its drawback and bohr’s postulate and derive expression for bohr radius , velocity & energy
Q.15 Explain mass defect , Binding energy , draw BE/Nucleon curve and solve numericals on it.
Q.16 Derive radioactive decay , alpha, beta &gamma decay,half life , average life ,activity &difference b/w nuclear fission & fusion , antineutrino not detected.
Q.17 explain doping with its type , depletion layer , V-I Characterstic for pn junction diode , effect on depletion in reverse and forward bias .
Q.18 Explain valence band theory for conductor , insulator and semiconductor , why Carbon is not semiconductor ,how R change with temp in Semiconductors.
Q.19 Explain working of pn junction diode as a half &full wave rectifier , LED and solar cell with its graph .
Q.20 Explain Transistor in CE mode with its input and output V-I graph and how it is used as an amplifier in CE mode , exp active , saturation and cutoff region.
Q.21 Explain Zener diode , how it work as a stabilizer , explain zener breakdown , avalanche breakdown and why it is heavily doped.
Q.22 Explain analog and digital input ,NOT , OR . NOT , NOR And NAND gate with truth table , how NAND & NOR used as universal gate and numerical on it.
Q.23 Define communication , modulation , demodulation ,transmitter , receiver , amplifier , bandwidth , transducer , repeater , channel , attenuation .
Q.24 Explain LOS communication , derive exp for height of antenna , what is need of modulation and explain point to point and broadcast in communication.
Q.25 Explain block diagram of communication , amplitude modulation & demodulation , explain use of internet , LAN , MAN ,WAN , working of GPS with uses.
Electromagnetism (electrostatic , electricity , magnet & Magnetism , EMI & AC , EM wave 8+7+8+8+3 = 34 marks )
Q.26 Define dielectric constant , dipole , dipole moment , electric flux , equipotential surface and electric field with properties , superposition principle .
Q.27 Derive exp for EF due to dipole at axial , equatorial , Potential Energy due to dipole , Torque due to dipole and condition for equilibrium .
Q.28 State and prove gauss theorem with application , EF due to plane sheet , charged rod , thin spherical shell and its graph and numerical on it.
Q.29 Explain principle , construction and working of PPC with and without dielectric slab , what happen when we insert dielectric when battery connected and when not connected , energy stored in capacitor , energy loss in capacitors , common potential , combination of capacitors and numerical on it.
Q.30 Exp drift velocity and factors on which Vd depend like temp , length , area , its relation with current , exp mobility , resistivity in term of tou and n.
Q.31 Explain wheatstone bridge and derive it with KVL , explain meter bridge , series , parallel and logical questions on it , with numericals on it.
Q.32 Explain color coding , internal resistance with factor , resistivity with temp , how R\ change when we stretch wire , numerical on KCL and KVL .
Q.33 Explain potentiometer over voltmeter , EMF v/s Potential Difference , principle of potentiometer work to find EMF , Compare EMf and find r.
Q.34 Explain Lorentz force and define 1Tesla, how cyclotron work , condition of resonance , derivation of radius , Time , KE and drawback of cyclotron .
Q.35 derive exp for force on conductor in mf . torque on coil carring current and MCG principle construction and working , radial MF & sensitivity.
Q.36 Explain how MCG converted into ammeter and voltmeter and numerical on it , define shunt and its working.
Q.37 Derive expression for force between conductors carrying current in same and different direction & def 1 Ampere with its all graph.
Q.38 State and prove ampere circuital law , derive exp for B due to solenoid and torroid .
Q.39 Explain biotsavart’s law , B due to coil at its centre , axis and B due to infinite straight conductor .
Q.40 Define Intensity of magnetization , magnetizing force , magnetic flux density , magnetic susceptibility , µr=1+χ , curie law and its effect with temp.
Q.41 Difference between dia , para and ferro magnetic material , define earth magnetism , inclination , declination .
Q.42 Explain hysteresis curve (I-H) and why we always use soft iron core , compare hysteresis curve for soft iron and steel.
Q.43 Explain magnetic flux , faradays laws of EMI , Lenz law and prove that it follow law of cons of energy and logical question on it.
Q.44 Explain motional emf of rectangle , rod in uniform MF , Explain eddy current with its applications , damping in galvanometer.
Q.45 Explain self and mutual inductance , Expression for mutual inductance between two long coaxial solenoid .
Q.46 Explain principle , construction and working of AC generator with its diagram and derivation of induced emf for it.
Q.47 Why AC preferred over DC , Derive Expression for Average & RMS value of AC , explain phasor diagram .
Q.48 How I & V vary for resistor , inductor , capacitor and draw graph for them , Explain RLC ckt with phase diagram &exp for impedance , power factor , phase ,resonance frequency and condition of resonance and . why Choke coil block DC.
Q.49 Derive expression for average power of RLC circuit and explain quality factor .
Q.50 Explain principle , construction and working of Transformer , transformation ratio , efficiency with expression and Explain its energy losses in detail .
Q.51 Explain EM wave with its diagram and properties.
Q.52 Explain electromagnetic spectrum with its wavelength and frequency and uses of each wave in our daily life like uv ,infrared , x ray , gamma ,microwave .
Q.53 Explain inconsistency in ampere circuital law given by Maxwell (displacement current equation).
Q.55 Explain Spectrum Produce by Hydrogen like lyman , balmer , paschen , bracket , pfund with numericals on them.
Q.56 Explain ground wave , sky wave , space wave , satellite type of communication with diagram.
Q.57 Explain current carrying loop as a dipole and expression for Magnetic dipole in uniform MF at axial , equatorial , torque due to magnetic dipole , Potential energy of magnetic dipole , bohr magneton.
Q.58 How FAX , MODEM , Mobile telephony ,and mobile calling work.
Mob.: 9039803981
SPECTRUM CLASSES
BEST QUESTIONS FOR CLASS XII BOARD PAPER 2017
Optics (ray and wave optics 7 + 7=14 marks)
Q.1 Derive expression for magnification of compound microscope , Astronomical telescope and solve numerical on them.
Q.2 Explain cassegrain telescope with diagram , difference between reflector and reflecting type telescope
Q.3 Derive expression for lens maker formula , what is effect on F when we dip in water , a high density medium , cut horizontally and vertically.
Q.4 Explain TIR with its conditions , working of optical fiber , porro prism and numerical on it.
Q.5 Derive thin lens formula , mirror formula , and solve numericals of combination of mirror and lens.
Q.6 Explain Huygens principle , prove law of reflection and snell’s law by it , explain wave front and its types.
Q.7 Define coherent sources and condition for sustained interference , explain youngs double slit exp , with derivation of fringe width and logical question on it with numerical.
Q.8 Explain brewester’s law , malus law with numerical , polarized light and prove that light is a transverse wave , how goggle polarized light.
Q.9 Explain diffraction with its condition , difference between interference and diffraction , explain diffraction by single slit and numericals on it .
Q.10 Explain Prism Formula , its graph , condition of minimum deviation , numerical on it , dispersion , why sky blue . how rainbow form .
Modern Physics(dual nature , atom and nuclei, semiconductor , communication 3+7+7+5=22)
Q.11 Explain photoelectric effect , threshold energy , threshold frequency and its all graph given in ncert.
Q.12 Explain Einstein photo electric equation and Emissions of photo Electron s .
Q.13 Derive expression for wavelength of debroglie wave for matter wave and electron and logical question on it and prove it by using davission germer exp.
Q.14 Explain Rutherford model , distance of closest approach with its drawback and bohr’s postulate and derive expression for bohr radius , velocity & energy
Q.15 Explain mass defect , Binding energy , draw BE/Nucleon curve and solve numericals on it.
Q.16 Derive radioactive decay , alpha, beta &gamma decay,half life , average life ,activity &difference b/w nuclear fission & fusion , antineutrino not detected.
Q.17 explain doping with its type , depletion layer , V-I Characterstic for pn junction diode , effect on depletion in reverse and forward bias .
Q.18 Explain valence band theory for conductor , insulator and semiconductor , why Carbon is not semiconductor ,how R change with temp in Semiconductors.
Q.19 Explain working of pn junction diode as a half &full wave rectifier , LED and solar cell with its graph .
Q.20 Explain Transistor in CE mode with its input and output V-I graph and how it is used as an amplifier in CE mode , exp active , saturation and cutoff region.
Q.21 Explain Zener diode , how it work as a stabilizer , explain zener breakdown , avalanche breakdown and why it is heavily doped.
Q.22 Explain analog and digital input ,NOT , OR . NOT , NOR And NAND gate with truth table , how NAND & NOR used as universal gate and numerical on it.
Q.23 Define communication , modulation , demodulation ,transmitter , receiver , amplifier , bandwidth , transducer , repeater , channel , attenuation .
Q.24 Explain LOS communication , derive exp for height of antenna , what is need of modulation and explain point to point and broadcast in communication.
Q.25 Explain block diagram of communication , amplitude modulation & demodulation , explain use of internet , LAN , MAN ,WAN , working of GPS with uses.
Electromagnetism (electrostatic , electricity , magnet & Magnetism , EMI & AC , EM wave 8+7+8+8+3 = 34 marks )
Q.26 Define dielectric constant , dipole , dipole moment , electric flux , equipotential surface and electric field with properties , superposition principle .
Q.27 Derive exp for EF due to dipole at axial , equatorial , Potential Energy due to dipole , Torque due to dipole and condition for equilibrium .
Q.28 State and prove gauss theorem with application , EF due to plane sheet , charged rod , thin spherical shell and its graph and numerical on it.
Q.29 Explain principle , construction and working of PPC with and without dielectric slab , what happen when we insert dielectric when battery connected and when not connected , energy stored in capacitor , energy loss in capacitors , common potential , combination of capacitors and numerical on it.
Q.30 Exp drift velocity and factors on which Vd depend like temp , length , area , its relation with current , exp mobility , resistivity in term of tou and n.
Q.31 Explain wheatstone bridge and derive it with KVL , explain meter bridge , series , parallel and logical questions on it , with numericals on it.
Q.32 Explain color coding , internal resistance with factor , resistivity with temp , how R\ change when we stretch wire , numerical on KCL and KVL .
Q.33 Explain potentiometer over voltmeter , EMF v/s Potential Difference , principle of potentiometer work to find EMF , Compare EMf and find r.
Q.34 Explain Lorentz force and define 1Tesla, how cyclotron work , condition of resonance , derivation of radius , Time , KE and drawback of cyclotron .
Q.35 derive exp for force on conductor in mf . torque on coil carring current and MCG principle construction and working , radial MF & sensitivity.
Q.36 Explain how MCG converted into ammeter and voltmeter and numerical on it , define shunt and its working.
Q.37 Derive expression for force between conductors carrying current in same and different direction & def 1 Ampere with its all graph.
Q.38 State and prove ampere circuital law , derive exp for B due to solenoid and torroid .
Q.39 Explain biotsavart’s law , B due to coil at its centre , axis and B due to infinite straight conductor .
Q.40 Define Intensity of magnetization , magnetizing force , magnetic flux density , magnetic susceptibility , µr=1+χ , curie law and its effect with temp.
Q.41 Difference between dia , para and ferro magnetic material , define earth magnetism , inclination , declination .
Q.42 Explain hysteresis curve (I-H) and why we always use soft iron core , compare hysteresis curve for soft iron and steel.
Q.43 Explain magnetic flux , faradays laws of EMI , Lenz law and prove that it follow law of cons of energy and logical question on it.
Q.44 Explain motional emf of rectangle , rod in uniform MF , Explain eddy current with its applications , damping in galvanometer.
Q.45 Explain self and mutual inductance , Expression for mutual inductance between two long coaxial solenoid .
Q.46 Explain principle , construction and working of AC generator with its diagram and derivation of induced emf for it.
Q.47 Why AC preferred over DC , Derive Expression for Average & RMS value of AC , explain phasor diagram .
Q.48 How I & V vary for resistor , inductor , capacitor and draw graph for them , Explain RLC ckt with phase diagram &exp for impedance , power factor , phase ,resonance frequency and condition of resonance and . why Choke coil block DC.
Q.49 Derive expression for average power of RLC circuit and explain quality factor .
Q.50 Explain principle , construction and working of Transformer , transformation ratio , efficiency with expression and Explain its energy losses in detail .
Q.51 Explain EM wave with its diagram and properties.
Q.52 Explain electromagnetic spectrum with its wavelength and frequency and uses of each wave in our daily life like uv ,infrared , x ray , gamma ,microwave .
Q.53 Explain inconsistency in ampere circuital law given by Maxwell (displacement current equation).
Q.55 Explain Spectrum Produce by Hydrogen like lyman , balmer , paschen , bracket , pfund with numericals on them.
Q.56 Explain ground wave , sky wave , space wave , satellite type of communication with diagram.
Q.57 Explain current carrying loop as a dipole and expression for Magnetic dipole in uniform MF at axial , equatorial , torque due to magnetic dipole , Potential energy of magnetic dipole , bohr magneton.
Q.58 How FAX , MODEM , Mobile telephony ,and mobile calling work.
Er.Shyam Pachori
CL 157 D.D Nagar Mob.: 9039803981
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