In a crystal, an atom vibrates at a frequency determined by_______________?

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...

__________ is a hard solder?

A. Tin-lead B. Tin-silver-lead C. Copper-zinc D. None 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...

For a hole which of the following statements is incorrect ?

A. Holes can exist in certain semiconductors only B. Holes can exist in any material including conductors C. Holes may constitute an electric current D. Holes can be considered as a net positive charge...