Electronics and Experimental Methods (CSIR Physical Sciences): Questions 41 - 42 of 44

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Question number: 41

» Electronics and Experimental Methods » Semiconductor Devices » Diodes

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

In figure shows a voltage regulator utilizing a Zener diode of breakdown voltage 5V.

Graph of input voltage verses time

Graph of Input Voltage Verses Time

In figure positive triangular wave of voltage passing through Zener diode is shown.

For Vi>5V , the Zener regulates the output voltage by channeling the excess current through itself. Which of the following waveforms shows the current i 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

In figure waveforms shows the current passing through Zener diode.

b.

Current passing through Zener diode: Choice B

Current Passing Through Zener Diode: Choice B

In figure waveforms shows the current passing through Zener diode.

c.

Current passing through Zener diode: Choice C

Current Passing Through Zener Diode: Choice C

In figure waveforms shows the current passing through Zener diode.

d.

Current passing through Zener diode: Choice D

Current Passing Through Zener Diode: Choice D

In figure waveforms shows the current passing through Zener diode.

Question number: 42

» Electronics and Experimental Methods » Propagation of Errors

Appeared in Year: 2016

MCQ▾

Question

In the schematic figure given below, assume that the propagation delay of each logic gate is tgate .

A circuit diagram of four gates

A Circuit Diagram of Four Gates

In figure a circuit diagram consists of a NOT gate, two OR gate and a AND gate, is shown.

The propagation delay of the circuit will be maximum when the logic inputs A and B make the transition – (June)

Choices

Choice (4) Response

a.

(0,1)(1, 1)

b.

(1,1)(0,1)

c.

(0, 0)(1, 1)

d.

(0,0)(0, 1)

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