KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 70 - 73 of 268

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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.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 72

» Experimental Skills » Speed of Sound in Air

Appeared in Year: 2012

MCQ▾

Question

The ratio of the speed of sound to the average speed of an air molecule at 300K and 1 atmospheric pressure is close to,

Choices

Choice (4) Response

a.

400

b.

Equation

c.

1

d.

Equation

Question number: 73

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2012

MCQ▾

Question

An ideal monatomic gas expands to twice its volume. If the process is isothermal, the magnitude of work done by the gas is Wi. If the process is adiabatic the magnitude of work done by the gas is Wa. Which of the following is true,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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