Video Lecture
Theory For Making Notes
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Practice Questions (Basic Level)
1.
Which one of the arrangements is figure shows the correct biasing of the collector in a transistor?
Ans (a)
2.
The distance between two atoms in contact is known as
(a) lattice parameter
(b) atomic radius
(c) number of constituent
(d) packing factor.
Ans (a)
3.
The value of a
(a) is always infinity
(b) is always less than 1
(c) lies between 50 and 150
(d) is always greater that 150.
Ans (b)
4.
The relation between a and b is given by
(a) \beta =\frac{\alpha }{{1-\alpha }}
(b) \displaystyle \alpha -\beta
(c) \beta =\frac{\alpha }{{1+\alpha }}
(d) \alpha =\frac{1}{\beta }.
Ans (a)
5.
The value of current gain in CB amplifier is
(a) greater than one
(b) less or greater than one
(c) less than one
(d) none of the above.
Ans (c)
6.
For a transistor IC = 25 mA and Ib = 1 mA. What is the value of a?
(a) 25/25
(b) 26/25
(c) 24/25
(d) 25/26.
Ans (d)
Practice Questions (JEE Main Level)
Comprehension Based Question (1 to 3)
A transistor has a base current of 0.08 mA and the emitter current is 10 mA. Determine
1.
the collector current
(a) 6.92 mA
(b) 0.35 mA
(c) 43.6 mA
(d) 9.92 mA
Ans (d)
2.
current gain in CB configuration and
(a) 1.453
(b) 0.234
(c) 0.992
(d) 2.349
Ans (c)
3.
current gain b in CE configuration?
(a) 124
(b) 321
(c) 854
(d) 547
Ans (a)
4.
The collector current for a transistor is 6.6 mA, and its current gain a is 0.95. Determine IBand b.
(a) 0.35 mA, 0.3
(b) 0.35 mA, 25
(c) 0.35 mA, 34
(d) 0.35 mA, 19
Ans (d)
Comprehension Based Question (5 and 6)
For a CB amplifier, the input resistance is 800 and the output resistance is 600 kW.
5.
Determine the voltage gian if the emitter current is 12 mA and a = 0.97.
(a) 735
(b) 727
(c) 758
(d) 795
Ans (b)
6.
What is the power gain?
(a) 770
(b) 754
(c) 700
(d) 706
Ans (d)
7.
The power gain for CB amplifier is 800, and the voltage amplification factor is 840. Find the collector current when the base current is 1.2 mA.
(a) 70 mA
(b) 13 mA
(c) 24 mA
(d) 20 mA
Ans (c)
8.
The current gain of a transistor is 0.95. What would be the change in collector current corresponding to a change of 0.4 mA in the base current in CE configuration?
(a) 7.59 mA
(b) 7.28 mA
(c) 7.6 mA
(d) 7.005 mA
Ans (c)
9.
The current gain of transistor in CB configuration is 0.98. Find the change in collector current corresponding to a change of 5.0 mA in the emitter current. What would be the change in base current?
(a) 4.9 mA, 0.1 mA
(b) 4.9 mA, 0.5 mA
(c) 4.9 mA, 0.67 mA
(d) 4.9 mA, 2.54 mA
Ans (a)
Practice Questions (JEE Advance Level)
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