List of top Physics Questions

Mention the difference between p-type and n-type semiconductors.
What is a light-emitting diode (LED)? Write down one application of it.
Explain the difference between nuclear fission and nuclear fusion.
What is the critical angle? Write down its necessary conditions.
Define two magnetic elements of the Earth.
What is an electromagnetic wave? On which factors does its velocity in vacuum depend?
Write down the energy losses in a transformer.
Find the increase in energy of a condenser of capacity \(6\, \text{pF}\) on changing the potential difference from 10 V to 20 V.
What are ohmic and non-ohmic resistances? Write down one example of each.
What is a cyclotron? State its two limitations.
Explain the polarization of light.
What is an eddy current? Write down its utilities.
The equivalent of decimal number 27 in binary number system will be:
In a full wave rectifier, if input frequency is 50 Hz, then output frequency will be:
The device which works for both modulation and demodulation is called:
Distance of communication satellite from the surface of the Earth is:
Define intensity of electric field at any point. Write down its S.I. unit.
Attenuation is measured in:
An electric dipole of dipole moment \(2 \times 10^{-6}\) cm is kept inside a closed surface. What will be the net electric flux coming out from the surface?
The half-life of a radioactive substance is:
P-N junction diode is used as:
Instrument used to increase input voltage/current is called:
Width of forbidden energy gap in the semiconductor is approximately:
If in a logic gate output \(Y\) is obtained by the product of its both inputs \(A \cdot B\), then the gate is:
Number of neutrons in an atom of \(^{230}_{90}\mathrm{Th}\) is: