KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 69 - 71 of 250

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Question number: 69

» Rotational Motion » Concepts of Rotational Motion

Appeared in Year: 2011

MCQ▾

Question

Figure below shows a small mass connected to a string, which is attached to a vertical post. If the ball is released when the string is horizontal as shown, the magnitude of the total acceleration (including radial and tangential) of the mass as a function of the angle θ is –

Small mass connected to string, which attached to vertical post

Small Mass Connected to String, Which Attached to Vertical Post

Figure shows a small mass connected to a string, which is attached to a vertical post. The ball is released when the string is horizontal and we have to find the magnitude of the total acceleration (including radial and tangential) of the mass as a function of the angle θ.

Choices

Choice (4) Response

a.

g3cos2θ+1

b.

gcosθ

c.

g3sin2θ+1

d.

gsinθ

Question number: 70

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2011

MCQ▾

Question

A constant amount of an ideal gas undergoes the cyclic process ABCA in the PV diagram shown below

Shows PV diagram of cycle

Shows PV Diagram of Cycle

In figure PV diagram of a cycle ABC is shown.

The path BC is an isothermal. The work done by the gas during one complete cycle, beginning and ending at A, is nearly –

Choices

Choice (4) Response

a.

-600 kJ

b.

-300 kJ

c.

600 kJ

d.

300 kJ

Question number: 71

» Wave Optics » Malus' Law and Its Application

Appeared in Year: 2012

MCQ▾

Question

An unpolarized beam of light of intensity Ι0 passes through two linear polarizers making an angle of 300 with respect to each other. The emergent beam will have intensity.

Choices

Choice (4) Response

a.

I08

b.

3I04

c.

3I08

d.

3I04

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