CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 125 - 127 of 463

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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.

Question number: 126

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2012

MCQ▾

Question

A horizontal circular platform rotates with a constant angular velocity directed vertically upwards. A person seated at the centre shoots a bullet of mass ‘m’ horizontally with speed ‘v’. The acceleration of the bullet, in the reference frame of the shooter, is – (June)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 127

» Classical Mechanics » Noether's Theorem

Appeared in Year: 2012

MCQ▾

Question

A binary star system consists of two stars S1 and S2, with masses m and 2m respectively separated by a distance r. If both S1 and S2 individually follow circular orbits around the centre of mass with instantaneous speed and respectively, the speed ratio is – (December)

Choices

Choice (4) Response

a.

0

b.

2

c.

1

d.

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