# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 811 - 814 of 2320

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## Question number: 811

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MCQ▾

### Question

A rope of length 15 m and linear density 2 kg/m is lying length wise on a horizontal smooth table. It is pulled by a force of 25 N. The tension in the rope at the point 7 m away from the point of application, will be –

### Choices

Choice (4)Response

a.

11.67 N

b.

13.33 N

c.

36.67 N

d.

Question does not provide sufficient data or is vague

## Question number: 812

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MCQ▾

### Question

The resistance of a coil for dc is 5 ohm. In ac, the resistance will

### Choices

Choice (4)Response

a.

Decrease

b.

Remain same

c.

Increase

d.

Be zero

## Question number: 813

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MCQ▾

### Question

The work done in pulling a body of mass 6 kg along an inclined plane (angle 45°) with coefficient of friction 0.2 through 2 m, will be -

### Choices

Choice (4)Response

a.

98.08 J

b.

90.08 J

c.

91.08 J

d.

99.72 J

## Question number: 814

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MCQ▾

### Question

The contact force exerted by a body A on another body B is equal to the normal force between the bodies. We conclude that -

(1) The surfaces must be smooth

(2) Force of friction between two bodies may be equal to zero

(3) Magnitude of normal reaction is equal to that of friction

(4) Bodies may be rough

Which of the following options are correct?

### Choices

Choice (4)Response

a.

3 and 4

b.

1 and 2

c.

1 and 4

d.

2 and 4

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