FET(Field Effect Transistors) Class 8 MCQ Electrical Engineering

Attempt now to check your rank among 37 students! 30 Questions 20 Mins

About this Quiz

This FET(Field Effect Transistors) Class 8 MCQ test contains random 30 Objective Questions. You have select one correct answer among given options.

FET(Field Effect Transistors) Class 8 MCQ With Answers

1. Here is an experimental circuit. Plotting(the voltage between collector and emitter) against the base current is shown. The graph shows that as base current increases to ...

  • the voltage across R3 increases
  • is constant
  • the transistor is saturated
  • the voltage across R3 increases

2. When a FET is conducting current the gate voltage may be ...

  • 0 V
  • greater than the threshold voltage but less than the supply
  • close to 0.7 V
  • between 0V and the threshold

3. A thyristor is triggered by a ...

  • negative pulse applied to the gate
  • negative pulse applied to the anode
  • positive pulse applied to the cathode
  • positive pulse applied to the gate

4. Over its operating range, the collector current of a transistor is directly proportional to ...

  • the change in base current
  • the collector voltage
  • the base current
  • the emitter voltage

5. The current through a FET is ...

  • constant
  • much greater than the base current
  • greater than that through a BJT
  • proportional to the gate voltage

6. A thyristor is not turned off by ...

  • short-circuiting anode to cathode
  • a negative pulse to the gate
  • turning off the power supply
  • interrupting the current through it

7. The symbol for a small signal current gain is

  •  
  •  
  •  
  •  

8. The normal voltage difference between the base and the emitter is ...

  • 0 V
  • about 0.7 V
  • equal to the collector voltage
  • variable

9. In a thyristor half-wave rectifier the lamp can be switched on at any time ...

  • In the first half of the positive half-cycle
  • after the peak of the positive half-cycle
  • in the cycle
  • in the second half of the positive half-cycle

10. A FET is used to convert ...

  • a small current to a larger current
  • a voltage to a current
  • a small current to a voltage
  • a small voltage to a larger voltage

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