KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 93 - 95 of 268

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Question number: 93

» Rotational Motion » Frequency and Period

Appeared in Year: 2014

MCQ▾

Question

A body moves in a circular orbit of radius R under the action of a central force. Potential due to the central force is given by Equation (k is positive constant). Period of revolution of body is equal to:

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 94

» Properties of Solids & Liquids » Thermal Expansion

Appeared in Year: 2014

MCQ▾

Question

A solid expands upon heating because –

Choices

Choice (4) Response

a.

The potential energy of interaction between atoms in the solid is asymmetric about the equilibrium positions of atoms.

b.

a fluid called the caloric flows into the interatomic spacing of the solid during heating thereby expanding it.

c.

The frequency of vibration of the atoms increases.

d.

The heating generates a thermal gradient between opposite sides.

Question number: 95

» Rotational Motion » Torque

Appeared in Year: 2014

MCQ▾

Question

A simple pendulum is attached to the block which slides without friction down an inclined plane (ABC) having an angle of inclination α as shown.

Free body diagram of pendulum

Free Body Diagram of Pendulum

In figure forces acting on a simple pendulum is attached to the block which slides without friction down an inclined plane is shown

While the block is sliding down the pendulum oscillates in such a way that its mean position the direction of the string is –

Choices

Choice (4) Response

a.

vertically downwards

b.

parallel to the inclined plane AC.

c.

at angle α to the perpendicular to the inclined plane AC.

d.

perpendicular to the inclined plane AC.

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