# KVPY Stream-SA (Class 11) Physics: Questions 146 - 149 of 252

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 252 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

## Question number: 146

MCQ▾

### Question

A point source of light is moving at a rate of 2 cm-s–1 towards a thin convex lens of focal length 10 cm along its optical axis. When the source is 15 cm away from the lens the image is moving at

### Choices

Choice (4) Response

a.

8 cm-s–1 away from the lens

b.

4 cm-s–1 away from the lens

c.

4 cm-s–1 towards the lens

d.

8 cm-s–1 towards the lens

## Question number: 147

MCQ▾

### Question

An open mouthed bottle contains a gas at 500 C. To what temperature should the gas be heated so that half mass of the gas may leave it?

### Choices

Choice (4) Response

a.

3730 C

b.

3800 C

c.

4440 C

d.

3500 C

## Question number: 148

MCQ▾

### Question

A hollow tilted cylindrical vessel of negligible mass rest is on a horizontal plane as shown. The diameter of the base is a and the side of the cylinder makes an angle θ with the horizontal. Water is then slowly poured into the cylinder. The cylinder topples over when the water reaches a certain height h, given by,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 149

MCQ▾

### Question

Two equal drops of rain falling in air with a constant velocity of 20 cm/sec. The drops mixed up and form a single drop, what would be their terminal velocity (in cm/sec)?

### Choices

Choice (4) Response

a.

71.74

b.

15.87

c.

25.25

d.

31.74

f Page