KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 16 - 19 of 268

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Question number: 16

» Kinetic Theory of Gases » Heat Capacities and Its Relations

Appeared in Year: 2010

MCQ▾

Question

An ideal gas with heat capacity at constant volume CV undergoes a quasistatic process described by PVα in a P-V diagram, where α is a constant. The heat capacity of the gas during this process is given by –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 17

» Atoms and Nuclei » Radioactivity

Appeared in Year: 2010

MCQ▾

Question

A nucleus has a half-life of 30 minutes. At 3 PM its decay rate was measured as Equation . What will be the decay rate at 5 PM?

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 18

» Oscillations and Waves » Doppler Effect in Sound

Appeared in Year: 2011

MCQ▾

Question

A speaker emits a sound wave of frequency f0. When it moves towards a stationary observer with speed u, the observer measures a frequency f1. If the speaker is stationary, and the observer moves towards it with speed v, the measured frequency is f2. Then –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 19

» Oscillations and Waves » Doppler Effect in Sound

Appeared in Year: 2010

MCQ▾

Question

A bus driving along at 39.6 km/h is approaching a person who is standing at the bus stop, while honking repeatedly at an interval of 30 seconds. If the speed of the sound is 330 m/s, at what interval will the person hear the horn?

Choices

Choice (4) Response

a.

29 seconds

b.

31 seconds

c.

30 seconds

d.

The interval will depend on the distance of the bus from the passenger

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