# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 278 - 282 of 2184

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## Question number: 278

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MCQ▾

### Question

A charge (-q) and another charge (+Q) are kept at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (-q) at A is moved to another point C such that ABC forms an equilateral triangle of side l. The net work done by electrostatic field in moving the charge (-q)

### Choices

Choice (4) Response

a.

Zero

b.

c.

d.

## Question number: 279

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MCQ▾

### Question

A body whose mass 4 kg is acted upon by two forces (8i + 10j) N and (4i + 8j) N. The acceleration produced will be (in m/s 2) -

### Choices

Choice (4) Response

a.

(3i + 2j)

b.

6i + 9j

c.

2i + 3j

d.

1/3 (G + 3)

## Question number: 280

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MCQ▾

### Question

A sphere of radius R has a uniform distribution of electric charge in its volume. At a distance x from its center, for x < R, the electric field is directly proportional to

### Choices

Choice (4) Response

a.

x 2

b.

c.

d.

x

## Question number: 281

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MCQ▾

### Question

A mass of 10 kg is hung to a spring balance in lift. If the lift is moving with an acceleration g/3 in upward & downward directions, choose the correct options related to the reading of the spring balance.

1. 13.3 kg
2. 66.7 kg
3. 32.6 kg
4. 0

Select the correct answers and mark it according to the following

### Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1 and 3 are correct

c.

2 and 4 are correct

d.

1,2 and 3 are correct

## Question number: 282

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MCQ▾

### Question

When the separation between two charges is increased, the electric potential energy of the charges is,

### Choices

Choice (4) Response

a.

decreases

b.

may increase or decrease

c.

Increases

d.

Remains the same