# NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 292 - 296 of 2142

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## Question number: 292

MCQ▾

### Question

Eight drops of mercury of equal radii possessing equal charges combine to form a big drop. Then the capacitance of bigger drop Compared to each individual small drop is

### Choices

Choice (4) Response

a.

8 times

b.

2 times

c.

4 times

d.

32 times

## Question number: 293

MCQ▾

### Question

Three particles, each having a charge of 10µC are placed at the corners of an equilateral triangle of side 10 cm. What is the electrostatic potential energy of the system? ( = 9xl0 9 Nm 2 /C 2)

### Choices

Choice (4) Response

a.

Zero

b.

27 J

c.

Infinite

d.

100 J

## Question number: 294

MCQ▾

### Question

The total mass of an elevator with a 50 kg man in it is 500 kg. This elevator moving upward with a speed of 8 m/sec, is brought to rest over a distance of 16m. The tension T in the cables supporting the elevator and the force exerted on the man by the elevator floor will respectively be

### Choices

Choice (4) Response

a.

624 N, 3900 N

b.

3900 N, 390 N

c.

620 N, 7800 N

d.

7800 N, 390 N

## Question number: 295

MCQ▾

### Question

Find the torque of a force F =-3 i + j+5 k acting at the point r = 7 i + 3 j + k

### Choices

Choice (4) Response

a.

-21i + 3j + 5k

b.

-l4i + 38j -16k

c.

4i + 4j + 6k

d.

14i - 38j + 16k

## Question number: 296

MCQ▾

### Question

For spherical symmetrical charge distribution, variation of electric potential with distance from center is given in and ,

Then which option are correct:

(1) Total charge within 2R 0 is q

(2) Total electrostatic energy for is non-zero.

(3) At electric potential is discontinuous

(4) There will be no charge anywhere except at

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1 and 3

b.

1, 2 and 4

c.

2 and 4

d.

1 and 2

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