The current gain of a pnp transistor is near zero. the ratio of collector current to emitter current. the negative of the npn current gain. the collector current divided by the emitter current. TRUE ANSWER : ? YOUR ANSWER : ?
A semiconductor material is formed by Electrovalent bonds Metallic bonds Covalent bonds None of these TRUE ANSWER : ? YOUR ANSWER : ?
The majority carriers in the emitter of a PNP transistor are free electrons. pentavalent atoms. trivalent atoms. holes. TRUE ANSWER : ? YOUR ANSWER : ?
The Q-point in a voltage amplifier is selected in the middle of the active region because it gives distortions less output. the circuit needs a small. it gives better stability. the biasing circuit then need less number of resistors. TRUE ANSWER : ? YOUR ANSWER : ?
In a bipolar junction transistor the base region is made very thin so that base can be easily fabricated. base can be easily biased. electric field gradient in base is high. recombination in base region is minimum. TRUE ANSWER : ? YOUR ANSWER : ?
For audio frequency applications, the popular oscillator used is Hartley oscillator Wien bridge oscillator Phase shift oscillator Crystal oscillator TRUE ANSWER : ? YOUR ANSWER : ?
When testing an npn transistor using an ohmmeter, the collector-emitter resistance will be low when the transistor is normal. the transistor is defective. the collector is positive in respect to the emitter. the emitter is positive in respect to the collector. TRUE ANSWER : ? YOUR ANSWER : ?
When a junction diode is Reverse Biased then diode acts like ....................... Close switch Short switch An open switch None of these TRUE ANSWER : ? YOUR ANSWER : ?
A diode (p-n junction) when reverse biased act as Off Switch On Switch Zener diode Capacitor TRUE ANSWER : ? YOUR ANSWER : ?
The early effect in a bipolar junction transistor is caused by Fast turn-off Fast turn-on Large emitter-base forward bias Large collector-base reverse bias TRUE ANSWER : ? YOUR ANSWER : ?