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PSEB XII
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Physics
List of top Physics Questions asked in PSEB XII
With help of labelled diagram, write principle of astronomical telescope and derive expression for magnifying power of an astronomical telescope, when final image is formed at least distance of distinct vision.
PSEB XII
Physics
General Physics
What is interference of light? Derive an expression for the fringe width in the Young’s double slit experiment.
PSEB XII
Physics
Youngs double slit experiment
Define binding energy per nucleon. Draw and explain the curve between binding energy per nucleon and mass number.
PSEB XII
Physics
Nuclear Energy
Find the coefficient of mutual inductance of a pair of coils if a current of 3 A in one coil causes the flux in the second coil of 1000 turns to change by \( 10^{-4} \, \text{weber} \) in each turn.
PSEB XII
Physics
General Physics
What is total internal reflection? Write necessary conditions for it.
PSEB XII
Physics
Optics
With the help of a circuit diagram, explain the V-I characteristics of a PN junction diode in forward biasing.
PSEB XII
Physics
PN Junction
What do you mean by impedance of LCR series circuit? Derive an expression for it by using phasor diagram.
PSEB XII
Physics
General Physics
A solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of 5 A. What is the magnitude of magnetic field inside the solenoid?
PSEB XII
Physics
Magnetic Field
Give any two uses of X-rays.
PSEB XII
Physics
General Physics
What is an equipotential surface? Show that no work is done in moving a given charge over an equipotential surface.
PSEB XII
Physics
General Physics
With a circuit diagram, explain how a meter bridge can be used to determine unknown resistance of a given wire.
PSEB XII
Physics
General Physics
Derive an expression for force per unit length between two parallel straight conductors carrying current in the same direction.
PSEB XII
Physics
General Physics
State Faraday’s law of electromagnetic induction.
PSEB XII
Physics
Electromagnetic Waves
Write Einstein’s photoelectric equation.
PSEB XII
Physics
Photoelectric Effect
Write any two differences between nuclear fission and nuclear fusion.
PSEB XII
Physics
Nuclear Energy
Draw labelled diagram of converting a galvanometer into an ammeter.
PSEB XII
Physics
General Physics
AC generator is based upon principle of electromagnetic induction. (T/F)
PSEB XII
Physics
Electromagnetic Waves
Photoelectric effect is not possible for the light of all frequencies. (T/F)
PSEB XII
Physics
Photoelectric Effect
Power of a thick lens is smaller than the thin lens. (T/F)
PSEB XII
Physics
Optics
Sustained interference is caused by the superposition of two waves coming from two coherent sources. (T/F)
PSEB XII
Physics
Optics
What do you mean by quantization of charge?
PSEB XII
Physics
General Physics
Define Kirchhoff’s first and second law.
PSEB XII
Physics
General Physics
Wave front due to light source situated at infinity is:
PSEB XII
Physics
Optics
The stopping potential depends upon:
PSEB XII
Physics
Photoelectric Effect
Isolated magnetic poles called magnetic monopoles are not known to exist. This statement is the result of:
PSEB XII
Physics
Magnetic Field
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