Electronics and Experimental Methods-Semiconductor Devices (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 5 - 6 of 6

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Question number: 5

» Electronics and Experimental Methods » Semiconductor Devices » Transistors

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Appeared in Year: 2012

MCQ▾

Question

The transistor in the given circuit has and . If the load resistance , the voltage and current gain are, respectively – (June)

Circuit diagram of transistor

Circuit Diagram of Transistor

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 6

» Electronics and Experimental Methods » Semiconductor Devices » Diodes

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Appeared in Year: 2011

MCQ▾

Question

The figure below shows a voltage regulator utilizing a Zener diode of breakdown voltage 5V and a positive triangular wave input of amplitude 10V.

A circuit for a voltage regulator

A Circuit for a Voltage Regulator

Graph of input voltage verses time

Graph of Input Voltage Verses Time

For , the Zener regulates the output voltage by channeling the excess current through itself. Which of the following waveforms shows the current passing through the Zener diode? (December)

Choices

Choice (4)Response

a.

Current passing through Zener diode: Choice A

Current Passing through Zener Diode: Choice A

b.

Current passing through Zener diode: Choice B

Current Passing through Zener Diode: Choice B

c.

Current passing through Zener diode: Choice C

Current Passing through Zener Diode: Choice C

d.

Current passing through Zener diode: Choice D

Current Passing through Zener Diode: Choice D

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