# 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

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.

b.

c.

d.

## Question number: 17

Appeared in Year: 2010

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 18

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.

b.

c.

d.

## Question number: 19

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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