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# Bipolar Junction Transistor MCQ Level -2

## 10 Questions MCQ Test Topic wise Tests for IIT JAM Physics | Bipolar Junction Transistor MCQ Level -2

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This mock test of Bipolar Junction Transistor MCQ Level -2 for IIT JAM helps you for every IIT JAM entrance exam. This contains 10 Multiple Choice Questions for IIT JAM Bipolar Junction Transistor MCQ Level -2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Bipolar Junction Transistor MCQ Level -2 quiz give you a good mix of easy questions and tough questions. IIT JAM students definitely take this Bipolar Junction Transistor MCQ Level -2 exercise for a better result in the exam. You can find other Bipolar Junction Transistor MCQ Level -2 extra questions, long questions & short questions for IIT JAM on EduRev as well by searching above.
QUESTION: 1

### A bipolar junction transistor with one junction forward biased and either the collector or emitter open, operates in the.

Solution:

When one junction is forward biased and either the collector or emitter is open, the BJT will operate in pinch-off region.
The correct answer is: pinch-off region

QUESTION: 2

### A common emitter transistor amplifier circuit is operated under a fixed bias. In this circuit, the operating point.

Solution:

In fixed bias, when temperature is increased, the operating point moves toward the saturation region.
The correct answer is: moves towards the saturation region with a decrease in temperature

QUESTION: 3

### In a typical npn transistor, the doping concentrations in emitter, base and collector regions are nE, nB, nC respectively. These satisfy the relation.

Solution:

In an npn transistor, emitter heavily doped, collector is moderately doped and base very thin and least doped, i.e.

QUESTION: 4

If for a silicon npn transistor, the base to emitter voltage (VBE) is 0.7Vand the collector to base voltage (VCB) is 0.2V, then the transistor is operating in the

Solution:

VB = 0.7V  (Forward-biased)
and VBC = -VCB
= -0.2V
(Reverse-biased)
hence, the transistor operates in normal active mode.
The correct answer is: normal active mode

QUESTION: 5

At very high frequency, mica capacitor are used, because.

Solution:

At high frequencies, mica capacitors are used because mica has very high resistivity at these frequencies. Mica is very useful material for making the frequencial substances.
The correct answer is: mica has high resistivity at these frequencies

QUESTION: 6

A piece of semiconductor material is introduced in a circuit. If the temperature of the material is raised, the circuit current n t will decrease.

Solution:

The circuit current will increase because as temperature of the semiconductor material increases , its resistance decreases .

QUESTION: 7

For an amplifier, the base of an npn transistor must be.

Solution:

The base of an npn transistor must be positive with respect to emitter. The correct answer is: positive with respect to emitter

QUESTION: 8

Which condition will saturate the BJT.

Solution:

If   the BJT will go into the state of saturation.

QUESTION: 9

In a voltage divider biased transistor circuit such as in figure given below.

Rin(base) can 9enerally t>e neglected in calculations when.

Solution:

If   then Rin (Base) can be neglected in the calculation.