List of top Physics Questions

Explain harmonics and overtones.
Calculate the energy radiated in one minute by a perfectly black body of surface area 200 cm\(^2\) when it is maintained at 127\(^{\circ}\)C.
Find kinetic energy of 1 litre of an ideal gas at S.T.P.
What do you mean by a thermodynamic system?
What is the work done by an external uniform magnetic field perpendicular to the velocity of a moving charge?
Which of the following equations gives correct expression for the internal resistance of a cell by using potentiometer?
The gate which produces high output, when its both inputs are high is --
An electron, a proton, an \(\alpha\)-particle and a hydrogen atom are moving with the same kinetic energy. The associated de-Broglie wavelength will be longest for --
A transformer increases an alternating e.m.f. from 220V to 880V. If primary coil has 1000 turns, the number of turns in the secondary coil are .............
The shortest distance between an object and its real image formed by a thin convex lens of focal length 20 cm is _____ cm. (in integer)
A body of mass 500 gram is rotating in a vertical circle of radius 1 m. What is the difference in its kinetic energies at the top and the bottom of the circle?
Define self-inductance and mutual inductance. Find an expression for mutual inductance of two coaxial solenoids.
What is photoelectric effect? What are the laws of photoelectric effect? Explain this law given by Einstein.
Define wavefront and secondary wavelets. Verify the law of reflection on the basis of Huygens’ wave theory.
Define volume density of charge. Write its SI unit.
State Kirchhoff's laws and use them to obtain the condition for balance of a Wheatstone bridge.
Mention two different modes of propagation used in communication system.
Explain magnetic moment. Write its SI unit.
Write two properties of beta rays.
A proton and an electron have the same kinetic energy. Which one has greater de Broglie wavelength and why?
State and prove Gauss's theorem in electrostatics. Calculate the electric field intensity at a point outside a hollow uniformly charged sphere.
Explain Bohr's stable orbit.
Convert decimal numbers 21 and 43 into their equivalent binary numbers.
Mention the two characteristic properties of the material suitable for making the core of a transformer.
Write down the difference between nuclear fission and nuclear fusion.