# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 295 - 298 of 2320

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## Question number: 295

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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.

620 N, 7800 N

b.

7800 N, 390 N

c.

624 N, 3900 N

d.

3900 N, 390 N

## Question number: 296

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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.

14i - 38j + 16k

b.

-21i + 3j + 5k

c.

4i + 4j + 6k

d.

-l4i + 38j -16k

## Question number: 297

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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.

2 and 4

b.

1,2 and 4

c.

1 and 3

d.

1 and 2

## Question number: 298

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MCQ▾

### Question

Three charges of equal value q’ are placed at the vertices of an equilateral triangle. What is the net potential energy, if the side of equilateral triangle is l?

### Choices

Choice (4)Response

a.

b.

c.

d.

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