CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 420 - 422 of 463

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Question number: 420

» Classical Mechanics » Dynamical System

Appeared in Year: 2016

MCQ▾

Question

A ball of mass is dropped from a tall building will zero initial velocity. In addition to gravity, the ball experiences a damping force of the form , where is its instantaneous velocity and is a constant. Given the values , and , the distance travelled (in meters) in time in seconds, is: (December)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 421

» Electromagnetic Theory » Electromagnetic Waves in Free Space

Appeared in Year: 2016

MCQ▾

Question

The electric field of an electromagnetic wave is , where and are positive constants. This represents: (December)

Choices

Choice (4) Response

a.

a linear polarised wave travelling in the positive z – direction

b.

a circularly polarised wave travelling in the negative z – direction

c.

an elliptically polarised wave travelling in the negative z – direction

d.

an unpolarised wave travelling in the positive z – direction

Question number: 422

» Mathematical Methods of Physics » Finite Difference Methods

Appeared in Year: 2016

MCQ▾

Question

Given the values , the approximate value of , computed by Newton’s forward difference method, is: (December)

Choices

Choice (4) Response

a.

0.804

b.

0.776

c.

0.788

d.

0.798

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