Mercury as an electric contact material is_______________?

Related Mcqs:

Superconductivity is observed for____________?

A. infrared frequencies B. d.c. and low frequency C. a.c. and high frequency D. frequencies having no effect E. none of the above...

At transition temperature the value of critical field is____________?

A. zero B. negative real value C. positive real value D. complex value...

Super conductivity can be destroyed by_____________?

A. adding impurities B. reducing temperatures C. application of magnetic field D. any of the above...

Carbon rods are used in wet and dry cells because_____________?

A. carbon rod serves as conductor B. carbon can resist the attack of battery acid C. both (A) and (B) D. either (A) or (B)...

The conduction of electricity, in semiconductors, takes place due to movement of______________?

A. positive ions only B. negative ions only C. positive and negative ions D. electrons and holes...