Electronics

A transistor has …………………

• one pn junction

• two pn junctions

• three pn junctions

• four pn junctions

The number of depletion layers in a transistor is …………

• four

• three

• one

• two

The base of a transistor is ………….. doped

• heavily

• moderately

• lightly

• none of the above

The element that has the biggest size in a transistor is ………………..

• collector

• base

• emitter

• collector-base-junction

In a pnp transistor, the current carriers are ………….

• acceptor ions

• donor ions

• free electrons

• holes

The collector of a transistor is …………. doped

• heavily

• moderately

• lightly

• none of the above

A transistor is a …………… operated device

• current

• voltage

• both voltage and current

• none of the above

In a npn transistor, ……………. are the minority carriers

• free electrons

• holes

• donor ions

• acceptor ions

The emitter of a transistor is ………………… doped

• lightly

• heavily

• moderately

• none of the above

In a transistor, the base current is about ………….. of emitter current

• 25%

• 20%

• 35 %

• 5%