# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 290 - 294 of 2320

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## Question number: 290

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MCQ▾

### Question

A 5 kg balls is swing in a vertical circle at the end of a cord 1 m long. The maximum speed at which it can swing if the cord can sustain maximum tension of 150 N will be –

### Choices

Choice (4)Response

a.

101 m/s

b.

36.5 m/s

c.

64 m/s

d.

3.18 m/s

## Question number: 291

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MCQ▾

### Question

A train has to negotiate a curve of radius 400 m. By how much should the outer rail be raised with respect to inner rail for a speed of 48 km/hr. The distance between the rails is 1 m.

### Choices

Choice (4)Response

a.

12 cm

b.

4.5 cm

c.

12 m

d.

4.5 m

## Question number: 292

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MCQ▾

### Question

Two small balls each having the charge + Q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each thread will be,

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 293

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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.

4 times

b.

8 times

c.

2 times

d.

32 times

## Question number: 294

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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.

27 J

b.

Zero

c.

Infinite

d.

100 J

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