Classical Mechanics-Special Theory of Relativity (CSIR Physical Sciences): Questions 1 - 3 of 15

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Question number: 1

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2013

MCQ▾

Question

The area of a disc in its rest frame S is equal to 1 (in some units). The disc will appear distorted to an observer O moving with a speed u with respect to S along the plane of the disc. The area of the disc measured in the rest frame of the observer O is (c is the speed of light in vacuum) (June)

Choices

Choice (4) Response

a.

(1u2c2)

b.

(1u2c2)12

c.

(1u2c2)12

d.

(1u2c2)1

Question number: 2

» Classical Mechanics » Special Theory of Relativity » Mass-Energy Equivalence

Appeared in Year: 2012

MCQ▾

Question

Three particle of equal mass m are connected by two identical mass less springs of stiffness constant k as shown in figure –

A system of three particles and two springs

A System of Three Particles and Two Springs

In figure three particles of equal mass m are connected by two identical massless springs of stiffness constant k.

If x1,x2andx3 denote the horizontal displacements of the masses from their respective equilibrium position, the potential energy of the system is – (December)

Choices

Choice (4) Response

a.

12k[x12+x22+x32x2(x1+x3)]

b.

12k[x12+2x22+x32+2x2(x1+x3)]

c.

12k[x12+x22+x32]

d.

12k[x12+2x22+x322x2(x1+x3)]

Question number: 3

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2012

MCQ▾

Question

Two events, separated by a (special) distance 9×109m , are simultaneous in one inertial frame. The time interval between these two events in a frame moving with a constant speed 0.8c (where the speed of light c=3×108ms ) is – (June)

Choices

Choice (4) Response

a.

40 s

b.

60 s

c.

20 s

d.

0 s

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