# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 784 - 789 of 2184

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## Question number: 784

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MCQ▾

### Question

In an ac circuit . The time required for the current to achieve its peak value will be

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 785

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MCQ▾

### Question

Two bodies of masses 2 kg and 4 kg are moving with velocities 5 m/s and 7 m/s respectively along same direction. Then the velocity of their center of mass will be

### Choices

Choice (4) Response

a.

7.3 m/s

b.

5.66 m/s

c.

6.4 m/s

d.

8.1 m/s

## Question number: 786

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MCQ▾

### Question

In a circuit, the value of alternating current is measured by hot wire ammeter as 10 ampere. Its peak value will be

### Choices

Choice (4) Response

a.

7.07 A

b.

14.14 A

c.

10 A

d.

20 A

## Question number: 787

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MCQ▾

### Question

Two blocks of mass m = 1 kg and M = 2 kg are in contact on a frictionless table. A horizontal force F (= 3N) is applied to m. The force of contact between the blocks, will be

### Choices

Choice (4) Response

a.

5N

b.

2N

c.

IN

d.

4N

## Question number: 788

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MCQ▾

### Question

The peak value of an alternating e. m. f. E given by E = E 0 cos t is 10 volts and its frequency is 50 Hz. At time , the instantaneous e. m. f. is

### Choices

Choice (4) Response

a.

10 V

b.

5 V

c.

1 V

d.

## Question number: 789

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MCQ▾

### Question

A transformer has turn ratio 100: 1. If secondary coil has 4 amp current then current in primary coil is

### Choices

Choice (4) Response

a.

0.4 A

b.

400 A

c.

4 A

d.

0.04 A