# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 198 - 202 of 268

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## Question number: 198

Appeared in Year: 2013

MCQ▾

### Question

A monkey is accelerating down a string whose breaking strength is one half of his weight. The minimum acceleration of the monkey should be,

### Choices

Choice (4) Response

a.

b.

c.

Zero

d.

g

## Question number: 199

MCQ▾

### Question

A rocket is fired upward from the earth’s surface such that it creates an acceleration of. If after 6 s, its engine is switched off, the maximum height of the rocket from earth’s surface would be – (Assume gravitation field is uniform)

### Choices

Choice (4) Response

a.

902 m

b.

486 m

c.

245 m

d.

850 m

## Question number: 200

MCQ▾

### Question

The wavelength of the first line of Balmer series is 6134 Å. The wavelength of the first line of Lyman series is –

### Choices

Choice (4) Response

a.

3008 Å

b.

3607 Å

c.

2678 Å

d.

3408 Å

## Question number: 201

MCQ▾

### Question

A bob of mass 0.5 kg hangs from the massless string of a long simple pendulum. A bullet of mass 0.05 kg is fired vertically from below into the bob. The bullet gets embedded into the bob and the combination rises vertically through a height of 3.2 m. If g = 10 m s-2, then the velocity of the bullet is,

### Choices

Choice (4) Response

a.

88 m s-1

b.

880 m s-1

c.

8800 m s-1

d.

8 m s-1

## Question number: 202

MCQ▾

### Question

A parent nucleus X is decaying into daughter nucleus Y which in turn decays to Z. The half-lives of X and Y are 6000 years and 30 years respectively. In a certain sample, it is found that the number of Y nuclei hardly change with time. If the number of X nuclei in the sample is the number of Y nuclei present in it is –

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page