# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 138 - 141 of 253

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## Question number: 138

MCQ▾

### Question

A convex lens of the focal length 22 cm is placed in front of a plane mirror at a distance 32 cm from the mirror. Where on the optical axis and from the centre of the lens should a small object be placed such that the final image coincides with the object?

### Choices

Choice (4) Response

a.

11 cm and on the opposite side of the mirror

b.

11 cm and between the mirror and the lens

c.

22 cm and between the mirror and the lens

d.

22 cm and on the opposite side of the mirror

## Question number: 139

MCQ▾

### Question

For simple harmonic motion with amplitude 4 cm and time period 7 seconds, what is the velocity and acceleration at a displacement 3 cm from equilibrium position?

### Choices

Choice (4) Response

a.

2.37, 2.42

b.

2.56, 2.73

c.

1.56, 2.18

d.

3.02, 3.34

## Question number: 140

Appeared in Year: 2015

MCQ▾

### Question

Methane is greenhouse gas because

### Choices

Choice (4) Response

a.

it absorbs longer wavelengths of the electromagnetic spectrum while transmitting shorter wavelengths.

b.

it transmits all wavelengths of the electromagnetic spectrum

c.

it absorbs all wavelengths of the electromagnetic spectrum

d.

it absorbs shorter wavelengths of the electromagnetic spectrum while transmitting longer wavelengths

## Question number: 141

MCQ▾

### Question

A small metal ball of diameter 4 mm and density 11.6 g cm-3 is dropped in glycerin of density 1.5 g cm-3. The ball attains a terminal velocity of 980 cm s-1. The coefficient of viscosity of glycerin is,

### Choices

Choice (4) Response

a.

4.9 poise

b.

980 poise

c.

16.49 poise

d.

9.8 poise

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