hari29

The region which is lightly doped in BJT is

• base

• collector

• emitter

• base and emitter

The region which is heavily doped in BJT is

• base

• emitter

• collector

• collector and emitter

The transistor is a ____________ operated device

• voltage

• current

• both of these

• none

At the base-emitter junctions of a transistor, one finds ……………

• 1. reverse bias

• a wide depletion layer

• low resistance

• none of the above

In a transistor ………………..

• I_C = I_E + I_B

• I_B = I_C + I_E

• I_E = I_C – I_B

• I_E  = I_C + I_B

In a circuit Voltage-divider bias provides ……….

• 1. an unstable Q point

• 1. a stable Q point

• 1. a Q point that easily varies with changes in the transistor’s current gain

• 1. a Q point that is stable and easily varies with changes in the transistor’s current gain

In amplitude modulation, bandwidth is ……………. the audio signal frequency

• once

• thrice

• twice

• four times

In an AM wave, the majority of the power is in …………….

• lower sideband

• upper sideband

• carrier

• none of the above

if semiconductor X has an energy band gap of 0.67 eV whereas semiconductor Y has an energy band gap of 1.1 eV then

• x is silicon and y is germanium

• x is germanium and y is silicon

• x is silicon and y is germanium arsenide

• y is silicon and x is germanium arsenide

FORMULA FOR RESISTOR IN SERIES :

(RULE): type the answer in caps