Materials and Components
When a material is in superconducting state and a magnetic field is applied

The superconducting property may be affected and resistivity may increase from zero to a low value
The superconducting property may be destroyed
The superconducting property is not affected
The material may become an insulator

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
If a small amount of Cu is added to Ni conductor, then

Resistivity of Ni remains the same
Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres
Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects
Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
An atom of a rare gas is placed is an electric field E. Then

The nucleus will be shifted in the direction of E by an amount which is independent of E.
The nucleus will be shifted in the direction of E by an amount which is proportional to E.
The nucleus will not be shifted.
The nucleus will be shifted in a direction opposite to that of E.

ANSWER DOWNLOAD EXAMIANS APP