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AE-JE Foundation EE : Analog Electronics Quiz 1

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Question 1

A bipolar junction transistor with forward current transfer ratio α = 0.98, When working in CE mode, provide current transfer ratio β as.

Question 2

In common emitter configuration of n-p-n transistor:

Question 3

A transistor to operate in reverse active region, the required condition is:

Question 4

In the small signal analysis of a BJT amplifier, the transconductance g_m = 40 mA/V and the current gain β = 50, then find out the resistance r_e?

Question 5

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

Assume V_{CE Sat} = 0.2 V.

Question 6

In the BJT circuit below, assume

and CE current gain

very large. Then the collector to base voltage

______V

Question 7

Consider the following statements regarding linear power supply:
1) It requires low frequency transformer.
2) It requires high frequency transformer.
3) The transistor works in active region.
Which of the above statements is/are correct?

Question 8

Except at high frequencies of switching, nearly all the power dissipated in the switch mode operation of a BJT occurs, when the transistor is in the

Question 9

The value of h_FE(the hybrid parameters) of a Common-Emitter (CE) connection of a Bipolar Junction Transistor (BJT) is given as 250. What is the value of α_dc (ratio of collector current to emitter current), for this BJT?

Question 10

Assertion (A): In a Darlington connection. Two transistors are connected in cascade in common emitter configuration.
Reason (R): The Darlington connection aims at making the current gain very high, almost equal to the product of bet of individual transistors.

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