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Bipolar Junction Transistor NAT Level -2 - Physics MCQ

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10 Questions MCQ Test - Bipolar Junction Transistor NAT Level -2

Bipolar Junction Transistor NAT Level -2 for Physics 2024 is part of Physics preparation. The Bipolar Junction Transistor NAT Level -2 questions and answers have been prepared according to the Physics exam syllabus.The Bipolar Junction Transistor NAT Level -2 MCQs are made for Physics 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Bipolar Junction Transistor NAT Level -2 below.

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*Answer can only contain numeric values

Bipolar Junction Transistor NAT Level -2 - Question 1

Calculate the voltage V_C of the circuit shown in the given figure:

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 1

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Bipolar Junction Transistor NAT Level -2 - Question 2

Calculate the minimum value of C₂ (in μF) if the amplifier operate over a frequency range of 2kHz to 10kHz?

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 2

R_E = 560Ω
X_C of the bypass capacitor C₂ should be

The capacitive value, at the minimum frequency of 2kHz

The correct answer is: 1.42

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*Answer can only contain numeric values

Bipolar Junction Transistor NAT Level -2 - Question 3

If the Q-point is 2 Vand 1 mA with the help of a feedback resistor R_B. β = 100, then what is the value of R_B in? (Take V_BE = 0.7V).

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 3

The correct answer is: 130

*Answer can only contain numeric values

Bipolar Junction Transistor NAT Level -2 - Question 4

Calculate the value of V_CE (in Volts) for the circuit shown below. (β = 100 and V_BE=0.7V).

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 4

Let us use Thevenin’s theorem

Now, applying KVL to Base circuit

= 9.45 μA
l_C = 0.945mA
Now, V_cc = I_cR_c - V_CE

The correct answer is: 6.22

*Answer can only contain numeric values

Bipolar Junction Transistor NAT Level -2 - Question 5

A npn transistor circuit has ∝ = 0.985. If I_C = 2mA then the value of l_B (in mA) is?

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 5

= 0.03 mA
The correct answer is: 0.03

*Answer can only contain numeric values

Bipolar Junction Transistor NAT Level -2 - Question 6

For the circuit shown below, the value of IC is:

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 6

Concept:
DC Analysis of BJT Amplifier
During the calculation of the DC parameter of a BJT amplifier, the capacitor is open-circuited.

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Bipolar Junction Transistor NAT Level -2 - Question 7

In the circuit shown in figure below, minimum value of β such that transistor in saturation is

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Bipolar Junction Transistor NAT Level -2 - Question 8

In a certain oscillator, A_v = 50. The attenuation of the feedback circuit must be?

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Bipolar Junction Transistor NAT Level -2 - Question 9

An amplifier of gain 1000 is made into a feedback amplifier by feeding 9.9% of its output voltage in series with the input opposing. If f_l = 20Hz and f_h = 200kHz for the amplifier without feedback then due to the feedback what is the new frequency (in kHz)?

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 9

The correct answer is: 20000

*Answer can only contain numeric values

Bipolar Junction Transistor NAT Level -2 - Question 10

V_CEapproximately equals ________ when a transistor switch is in saturation.

Detailed Solution for Bipolar Junction Transistor NAT Level -2 - Question 10

"Saturation" in a transistor switch circuit is achieved when the voltage across the collector/ emitter (V_CE(sat)) is less than or equal to . 1 to . 3 volts - depending on the type of transistor. At that voltage point, the transistor appears to act like a simple SPST mechanical switch that has been closed (On).

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