# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 223 - 226 of 268

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## Question number: 223

MCQ▾

### Question

A air bubble is formed at the bottom of a lake. When the bubble rises to the surface, its radius increases 4 times. The depth of the lake at that spot is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 224

Appeared in Year: 2014

MCQ▾

### Question

One mole of a monoatomic ideal gas is expanded by a process described by where C is a constant. The heat capacity of the gas during the process is given by (R is the gas constant).

### Choices

Choice (4) Response

a.

b.

R

c.

d.

## Question number: 225

Appeared in Year: 2015

MCQ▾

### Question

A simple pendulum of length l is made to oscillate with amplitude of 45 degrees. The acceleration due to gravity is g. Let. The time period of oscillation of this pendulum will be

### Choices

Choice (4) Response

a.

Slightly more than T0.

b.

Slightly less than T0.

c.

T0 irrespective of the amplitude.

d.

Dependent on whether it swings in a plane aligned with the north – south or east – west directions.

## Question number: 226

Appeared in Year: 2014

MCQ▾

### Question

The angles of incidence and refraction of a monochromatic ray of light of wavelength λ at an air-glass interface are i and r, respectively. A parallel beam of light with a small spread δλ in wavelength about a mean wavelength λ is refracted at the same air-glass interface. The refractive index µ of glass depends on the wavelength λ as where a and b are constants. Then the angular spread in the angle of refraction of the beam is –

### Choices

Choice (4) Response

a.

b.

c.

d.

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