List of top Physics Questions

The stopping potential for a fast moving photo-electron is independent of:
Arrange the following numbers in ascending order:
A. (10110.011)\(_2\)
B. (32)\(_{10}\)
C. (5F.8)\(_{16}\)
D. F\(_{16}\)
Choose the Correct answer from the options given below:
The first maxima for Bragg's diffraction pattern by a crystal is observed at 30\(^{\circ}\) when X-rays wavelength of 0.32 nm are used. The distance between the atomic planes is:
Brillouin zone is:
A. Wigner-Seitz cell of reciprocal lattice
B. Primitive unit cell
C. The locus of all k-values in the reciprocal lattice which are Bragg reflected.
D. Wigner-Seitz cell of direct lattice
The correct statements are:
In a semiconductor, intrinsic concentration of charge carriers varies with:
Subtract (29.A)\(_{16}\) from (4F.B)\(_{16}\)
The lattice constant of a simple cubic lattice having interplanar spacing 3\AA{ for (002) plane is:}
Arrange the following crystal structures in ascending order of their coordination number.
A. Diamond
B. Sodium Chloride
C. Cesium Chloride
D. Zinc with hexagonal closed packed structure
Choose the CORRECT answer from the options given below:
In an adiabatic process, the work done by the gas is 500 J. What is the change in internal energy of the gas?
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?
Three blocks A, B and C are arranged as shown in the figure such that the distance between two successive blocks is 10 m. Block A is displaced towards block B by 2 m and block C is displaced towards block B by 3 m. The distance through which the block B should be moved so that the centre of mass of the system does not change is
Three blocks A, B and C are arranged as shown in the figure
Define self-inductance and mutual inductance. Find an expression for mutual inductance of two coaxial solenoids.
Define wavefront and secondary wavelets. Verify the law of reflection on the basis of Huygens’ wave theory.
What is photoelectric effect? What are the laws of photoelectric effect? Explain this law given by Einstein.
State and prove Gauss's theorem in electrostatics. Calculate the electric field intensity at a point outside a hollow uniformly charged sphere.
Mention two different modes of propagation used in communication system.
Explain Bohr's stable orbit.
State Kirchhoff's laws and use them to obtain the condition for balance of a Wheatstone bridge.
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?
Define volume density of charge. Write its SI unit.
Explain magnetic moment. Write its SI unit.
Mention the two characteristic properties of the material suitable for making the core of a transformer.
Compare the magnetic properties of steel and soft iron.