CSIR Physical Sciences: Questions 122 - 125 of 389

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Question number: 122

» Electromagnetic Theory » Electrostatics: Gauss's Law and Its Applications

Appeared in Year: 2011

MCQ▾

Question

Four equal point charges are kept fixed at the four vertices of a square. How many neutral points i. e. , points where the electric field vanishes will be found inside the square? (December)

Choices

Choice (4) Response

a.

4

b.

3

c.

7

d.

5

Question number: 123

» Electromagnetic Theory » Gauss Law and Applications

Appeared in Year: 2011

MCQ▾

Question

A static charge distribution gives rise to an electric field of the form E=α(1erR)r^r2 , where α and R are positive constants. The charge contained within a sphere of radius R, centered at the origin is: (December)

Choices

Choice (4) Response

a.

παε0eR2

b.

αε04π(11e)

c.

4παε0Re

d.

παε0e2R2

Question number: 124

» Electronics and Experimental Methods » Digital Techniques and Applications » Registers

Appeared in Year: 2012

MCQ▾

Question

The logic circuit shown in the figure below,

A logic circuit diagram

A Logic Circuit Diagram

In figure a logic circuit diagram consists of two Ex-OR gates and one OR gate.

implements the Boolean expression, (December)

Choices

Choice (4) Response

a.

y=A+B

b.

y=AB¯

c.

y=AB

d.

y=A¯B¯

Question number: 125

» Electronics and Experimental Methods » Semiconductor Devices » Diodes

Appeared in Year: 2013

MCQ▾

Question

Two identical Zener diodes are placed back to back in series and are connected to a variable DC power supply. The best representation of the I – V characteristics of the circuit is – (December)

Choices

Choice (4) Response

a.

I – V characteristics: Choice A

I – v Characteristics: Choice A

Figure shows I – V characteristic of circuit consists of two identical Zener diodes.

b.

I – V characteristics: Choice B

I – v Characteristics: Choice B

Figure shows I – V characteristic of circuit consists of two identical Zener diodes.

c.

I – V characteristics: Choice C

I – v Characteristics: Choice C

Figure shows I – V characteristic of circuit consists of two identical Zener diodes.

d.

I – V characteristics: Choice D

I – v Characteristics: Choice D

Figure shows I – V characteristic of circuit consists of two identical Zener diodes.

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