For transistor action Je must be forward biased and Jc should be reverse biased. the base region must be very thin and lightly doped. the emitter should be heavily doped. all of these. TRUE ANSWER : ? YOUR ANSWER : ?
A JFET can operate in depletion and enhancement mode only. depletion mode only. none of these. enhancement mode only. TRUE ANSWER : ? YOUR ANSWER : ?
If the series resistance increases in an unloaded zener regulator, the zener current increases. decreases. equals the voltage divided by the resistance. stays the same. TRUE ANSWER : ? YOUR ANSWER : ?
Common emitter current gain hFE of a BJT is Dependent on collector-emitter voltage. Always constant. Dependent on collector current. Dependent on base -emitter voltage. TRUE ANSWER : ? YOUR ANSWER : ?
The current gain of a pnp transistor is the collector current divided by the emitter current. the ratio of collector current to emitter current. the negative of the npn current gain. near zero. TRUE ANSWER : ? YOUR ANSWER : ?
Binary Logic is mainly based on arithmetic operation and both A and B addition operations logical operations subtraction operations TRUE ANSWER : ? YOUR ANSWER : ?
A 3 - phase diode bridge rectifier is fed from a 400 V rms, 50 Hz, 3 phase AC source. If the load is purely resistive, then peak instantaneous output voltage is equal to 400 V. 400√ 2 V. 400√ (2/3) V. 400 / √ 3 V. TRUE ANSWER : ? YOUR ANSWER : ?
The input stage of an op amp is usually a differential amp. CE amplifier. swamped amplifier. class B push-pull amplifier. TRUE ANSWER : ? YOUR ANSWER : ?
The emitter electric current in a junction with normal bias changes greatly by a small changes in collector bias voltage. is almost equal to the base current. is equal to the sum of IB and IC. is equal to ICBO. TRUE ANSWER : ? YOUR ANSWER : ?
When pn junction is reverse biased All of these it offers a very high resistance a small current flows through it because of minority carriers the witdh of depletion layer increases TRUE ANSWER : ? YOUR ANSWER : ?