Q. The number of protons in a copper atom are

View solution

Q. When a material is in superconducting state and a magnetic field is applied

View solution

Q. For a diamagnetic material, μᵣ = 1.

View solution

Q. We can know the arrangement of atom in a material by studying electron diffraction pattern.

View solution

Q. The magnetic quantum number determines the component of angular momentum along a prescribed direction.

View solution

Q. Wood is a diamagnetic material.

View solution

Q. Curie Weiss law is Ɛ = C/(T-ϴ) .

View solution

Q. Consider the following materials

1. Nickel
2. Silver
3. Oxygen
4. Aluminium

The correct sequence in the order of decreasing permeability is

View solution

Q. Yettrium-iron garnet (Y₂Fe₅O₁₂) is a soft magnetic material suitable for applications involving

View solution

Q. The mass of proton and electron are

View solution

Q. A rare gas having N atoms/m³ is subjected to an electric field E. The electric dipole moment per unit volume is proportional to N and E.

View solution

Q. In an intrinsic semiconductor, at a given temperature T

View solution

Q. The core of a solenoid is made of material of relative permeability μᵣ. A small cavity area dA and length dl is cut in the core. If it is desired that flux density in the cavity should be equal to B0

View solution

Q. A copper specimen has resistivity equal to 1.8 x 10¯⁸ ohm-m at room temperature. At a temperature of 700 K, the resistivity is likely to be

View solution

Q. Assertion (A): Dielectric constant is independent of temperature unless the temperature is extremely high.

Reason (R): For normal temperatures the number of atoms per unit volume is constant.

View solution

Q. As the atoms of rare gases become larger, electronic polarizability

View solution

Q. Ferrimagnetic materials have anti-parallel orientation of equal moments of permanent dipoles.

View solution

Q. Carbon steel has a residual flux density of 1 Wb/m².

View solution

Q. When an atom of polarizability a is placed in an electric field E, the energy stored in atom is 0.5 α E².

View solution

Q. The charge per proton is

View solution