# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 717 - 721 of 2184

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## Question number: 717

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MCQ▾

### Question

Two bodies of masses 2 kg and 4 kg are moving with velocities 2 m/s and 10 m/s respectively along same direction. Then the velocity of their center of mass will be

### Choices

Choice (4) Response

a.

5.3 m/s

b.

8.1 m/s

c.

6.4 m/s

d.

7.3 m/s

## Question number: 718

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MCQ▾

### Question

The work done in lifting water from a well of depth 6 m using a bucket of mass 1.3 kg and volume 1 liter, will be

### Choices

Choice (4) Response

a.

147 J

b.

105.84 J

c.

98 J

d.

135.24 J

## Question number: 719

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MCQ▾

### Question

If the current in the primary coil is reduced from 3.0 ampere to zero in 0.001 second, the induced e. m. f in the secondary coil is 1500 volt. The mutual inductance of the two coils will be

### Choices

Choice (4) Response

a.

0.0005 H

b.

0.005 H

c.

0.05 H

d.

0.5 H

## Question number: 720

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MCQ▾

### Question

The two particles X and Y, initially at rest, start moving towards each other under mutual attraction. If at any instant the velocity of X is V and that of Y is 2V, the velocity of their center of mass will be 3

### Choices

Choice (4) Response

a.

V/2

b.

0

c.

2V

d.

V

## Question number: 721

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MCQ▾

### Question

The voltage across a pure inductor is represented by the following diagram. Which one of the following diagrams will represent the current? Graph of v→T (As Cos Function) Here in figure voltage across a pure inductor is represented.

### Choices

Choice (4) Response

a. Diagram of Current vs Time (Choice A) In figure current i→t (time) graph is indicate.

b. Diagram of Current vs Time (Choice B) In figure current i→t (time) graph is indicate.

c. Diagram of Current vs Time (Choice C) In figure current i→t (time) graph is indicate.

d. Diagram of Current vs Time (Choice D) In figure current i→t (time) graph is indicate.