Materials and Components
The resistance of a photoconductor

Remains constant
May increase or decrease with increase in light intensity
Decreases with increase in light intensity
Increases with increase in light intensity

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
Electrical contact materials used in switches, brushes, relay must possess

High thermal conductivity and high melting point
Low thermal conductivity and low melting pointL
High thermal conductivity and low melting point
Low thermal conductivity and high melting point

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
In an intrinsic semiconductor, at a given temperature T

The number of electron hole pairs generated per second due to thermal motion is always more than the number of electron-hole pairs lost per second due to recombination
The number of electron-hole pairs generated per second due to thermal motion is always less than the number of electron-hole pairs lost per second due to recombination
Any of the above
The number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Materials and Components