# KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 213 - 217 of 253

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## Question number: 213

MCQ▾

### Question

27 identical water drops, carrying equal charge q and having the same potential V, merge together. The energy of the new drop is given as,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 214

MCQ▾

### Question

A uniform rod AB of length 2 m is sliding along two mutually perpendicular surface OA and OB as shown in figure. When rod subtends an angle 600 with OB, the end Q has a velocity. The velocity of the end P at that time is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 215

MCQ▾

### Question

In a concave mirror, an object is placed at a distance 27 cm from the focus and its image is formed at a distance 3 cm from the focus. The focal length of the mirror is,

### Choices

Choice (4) Response

a.

9 cm

b.

4 cm

c.

5 cm

d.

3 cm

## Question number: 216

MCQ▾

### Question

In a Young’s experiment, the interference pattern is found to have an intensity ratio between the bright and dark fringes as 36. The intensity ratio of the two interfering light waves is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 217

MCQ▾

### Question

A soldier with a machine gun, falling from an airplane gets detached from his parachute. He is able to resist the downward acceleration if the shoots 60 bullets a second at the speed of 450 m/s. If the weight of a bullet is 53 gm, what is the weight of the man with the gun? Ignore resistance due to air and assume the acceleration due to gravity g = 9.8 ms–2

### Choices

Choice (4) Response

a.

112 kg

b.

152 kg

c.

146 kg

d.

136 kg

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