Such things which can have only two possible states are known as

A circuit which implements AND operation is

A. AND gate

B. OR gate

C. NOT gate

D. NOR gate

The quantities whose values vary in non-continuous manner are

A. analogue

B. digital

C. scalar

D. vector

To investigate the properties of electron beam, we use

A. proton gun

B. bullet gun

C. voltage gun

D. electron gun

In AND operation if any one of logic input is at '0' then output is

A. 1

B. 0

C. 2

D. 4

The process of emission of electrons from the hot metal surfaces is called

A. plastic emission

B. thermionic emission

C. static emission

D. current emission