ELECTRONIC PRACTICE - Practice Mode

1) Which type of biasing is required to a NPN transistor for amplification?

Base ground, emitter and collector positive Base negative, emitter positive and collector negative Base positive, emitter negative and collector positive Base positive, emitter negative and collector negative

Correct Answer: Base positive, emitter negative and collector positive

2) Why negative feedback is required in amplifier circuits?

To reduce the distortion To increase the amplification factor To increase the output voltage gain To increase the output current gain

Correct Answer: To reduce the distortion

3) What is the purpose of DIAC in power control circuits?

As rectifier For triggering As an oscillator For amplification

Correct Answer: For triggering

4) Which type of control device is used in electronic fan regulator control circuits?

FET UJT DIAC TRIAC

Correct Answer: TRIAC

5) Which quadrant operation of SCR delivers heavy current in reverse biasing?

First quadrant Third quadrant Fourth quadrant Second quadrant

Correct Answer: Third quadrant

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