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PHYSICS – IMPORTANT QUESTION BANK
Calculate the magnetic field at point inside on the axis of a solenoid having infinite length.
State difference between Ammeter and voltmeter.
Derive Newton’s formula for focal length of convex lens. Whether this formula is true for all kinds of lens? Write with reason.
Why is spark produced in a switch when current is switched off? If the current of 5 ampere flowing through primary coil is decreased to zero in 1.0 second then induced e.m.f. in secondary coil is 10 volt, calculate mutual inductance.
Write Faraday’s Laws of Electromagnetic Induction and obtain an expression of induced e.m.f.
Write laws of photoelectric effect.
What is meant by shunt? Write the principle of shunt.
Explain Biosavart’s Law.
Work function of copper is 4 eV. What is meant by this statement?
Derive expression for the force acting between two parallel current carrying conductors. When will it be attractive and when will it be repulsive?
What are electromagnetic waves? Write their characteristics
With the help of Biot-Severt’s law, obtain an expression for the intensity of magnetic field near a straight, long current carrying conductor.
Describe the experiment of finding out internal resistance of any cell by potentiometer under following headings –Electric circuit, Deduction of formula, Observation table and two precautions.
What arrangements are made for making moving coil galvanometer, Dead Beat? Calculate value of self inductance of the coil if 1.2 ampere current is flowing through the coil having 1000 turns and flux linked with it is 1.2 x 10-5 Wb.
What is a greenhouse effect?
What is light emitting diode (LED). Explain its working principle and state factors on which the colour of light emitted by it depends.
What is optical fibre? What are main parts of it? Explain.
The magnifying power of an objective lens of a compound microscope is 8 if the magnifying power of the compound microscope is 32. Then calculate magnifying power of an eyepiece lens.
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