Thermonic emission occurs in______________?

Related Mcqs:

On which of the following factors does the resistivity of a material depend ?

A. Resistance of the conductor B. Area of the conductor section C. Length of the conductor D. All of the above...

Overhead telephone wires are made of_____________?

A. aluminium B. steel C. ACSR conductors D. copper...

A carbon resistor contains_____________?

A. carbon crystals B. solid carbon granules C. pulverized coal D. finely divided carbon black...

Due to which of the following reasons copper and aluminium are not used for heating elements ?

A. Both have great tendency for oxidation B. Both have low melting point C. Very large length of wires will be required D. All of the above...

For a particular material the Hall coefficient was found to be zero. The material is______________?

A. insulator B. metal C. intrinsic semiconductor D. none of the above...