# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 115 - 118 of 253

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## Question number: 115

MCQ▾

### Question

A stationary U238 nucleus emits on α-particle (2He4) with velocity and kinetic energy 3.8 MeV. What is the velocity of the residual nucleus?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 116

MCQ▾

### Question

A liquid of density 0.9 is flowing through horizontal tube of varying cross-sectional area. The diameter at point A is 12 cm and diameter at point B is 6 cm in tube. The manometer shows 16 cm pressure between A and B in two limbs. So what is the rate of flow of liquid in the tube?

### Choices

Choice (4) Response

a.

5562

b.

5030

c.

5392

d.

5782

## Question number: 117

MCQ▾

### Question

The gravitational potential difference between a point at the surface of a certain planet and a point 20 m above the surface is 8 J kg-1. Assume the gravitational field to be uniform. What is the work done in joule in moving a mass of 4 kg from the surface to a point 5 m above the surface?

### Choices

Choice (4) Response

a.

0.16

b.

4.0

c.

1.5

d.

8.0

## Question number: 118

Appeared in Year: 2015

MCQ▾

### Question

An optical device is constructed by fixing three identical convex lenses of focal lengths 10 cm each inside a hollow tube at equal spacing of 30 cm each. One end of the device is placed 10 cm away from a point source. How much does the image shift when the device is moved away from the source by another 10 cm?

### Choices

Choice (4) Response

a.

0

b.

15 cm

c.

5 cm

d.

45 cm

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