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Revision Quiz on Semiconductor Electronics

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Question 1

In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be:

Question 2

The current gain of a common emitter amplifier is 69. If the emitter current is 7.0 mA, collector current is:

Question 3

For a transistor shown in the figure, the dc current gain and. The switch S is initially open. Calculate the voltage at point A. If the switch S is now closed, what would be the voltage at point A?

Question 4

A realistic graph depicting the variation of the reciprocal of input resistance in an input characteristics measurement in a common emitter transistor configuration is:

Question 5

A plot of the common-emitter characteristics of a silicon n-p-n transistor is shown below. Given this information and that there will be a 0.7 V drop across a forward biased silicon p-n junction, the approximate value of output voltage  for an input voltage in the adjacent circuit will be

Question 6

In a transistor amplifier, when the signal changes by 0.04 V, the base current changes by and collector current by 2 mA. If collector load and. Then find the voltage gain

Question 7

For the transistor circuit that shown in the figureand. Determine the base current of the transistor.

Question 8

A npn transistor connected with some resistance as shown below. If the value offor transistor is 100 and 0.5 respectively then find the base current of the transistor.

Question 9

Calculate the mobility of electron in an n-type semiconductor. if the density of conduction electron and holes are and respectively. The resistivity of semiconductor and mobility of holes is and, respectively.

Question 10

In the following circuit, D1 and D2 are diodes with the forward voltage drop of 0.6V and reverse breakdown voltage of 5V. The current through the resistance R2 approximately will be

Question 11

At absolute zero, Si acts as:

Question 12

An ideal diode and a resistor are connected as shown in the diagram below. A sinusoidal voltage is applied as the input . Which of the four waveforms shown below describes the output ? (T is the time period of the input waveform, and R is a series resistance.)

Question 13

For given logic gate, write down the Boolean equation expressing the output X in terms of the input A, B, and C

Question 14

If a, b, c, d are inputs to a gate and x is its output, then, as per the following time graph, the gate is :
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Question 15

An npn transistor is in saturation mode, if the common emitter current gain is β and the base current is IB, then
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Mar 15JEE & BITSAT