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Bipolar Junction Transistor NAT Level -1 - Physics
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10 Questions MCQ Test Topic wise Tests for IIT JAM Physics - Bipolar Junction Transistor NAT Level -1
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Bipolar Junction Transistor NAT Level -1 - Question 1
For a transistor circuit, VCE when Vin = 0V (in volts).
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Bipolar Junction Transistor NAT Level -1 - Question 2
For a BJT, the current amplification factor ∝ = 0.9 . This transistor is connected in common emitter configurations. When the base current changes by 0.4 mA, the change in collector current will be (in mA).
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Bipolar Junction Transistor NAT Level -1 - Question 3
A power amplifier gives 150 W output of or an input of 1.5W. The gain in dB is :
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Bipolar Junction Transistor NAT Level -1 - Question 4
What is the current gain for a common-base configuration where IE = 4.2 mA and IC = 4.0 mA?
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Bipolar Junction Transistor NAT Level -1 - Question 5
Figure shows a common emitter amplifier with β = 100. What is the maximum peak to peak input signal (in mV) for which distortion free output may be obtained Assume VBE = 0 rE = 20 Ω
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Bipolar Junction Transistor NAT Level -1 - Question 6
In the following circuit, Tr1 and Tr2 are identical transistors having VBE = 0.7V. The current passing through the transistor Tr2 is (in mA).
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Bipolar Junction Transistor NAT Level -1 - Question 7
If the transistor amplifier has a gain of 20dB, then the ratio of output to input power is :
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Bipolar Junction Transistor NAT Level -1 - Question 8
A common emitter amplifier has voltage gain of 50, an input impedance of 1000Ω and an output impedance of 200Ω. The power gain of the amplifier will be (in dB).
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Bipolar Junction Transistor NAT Level -1 - Question 9
The input signal given to a common emitter amplifier having a voltage gain of 20 is Vin = 20 cos (5t + 20°). The corresponding output signal has an amplitude equal to ?
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Bipolar Junction Transistor NAT Level -1 - Question 10
The feedback ratio of an amplifier, which an amplification of a negative feedback, changes the voltage gain the voltage gain from - 250 to - 100 is (give magnitude only).
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