# NEET Physics: Questions 761 - 765 of 2098

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## Passage

In Figure given, there is a conducting loop ABCDEFA, of resistance per unit length placed near a long straight current-carrying wire. The dimensions are shown in the figure. The long wire lies in the plane of the loop. The current in the long wire varies as I = I 0 t.

## Question number: 761 (1 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The e. m. f. induced in the closed loop is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 762 (2 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The mutual inductance of the pair is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 763 (3 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The heat produced in the loop in time t is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 764

MCQ▾

### Question

A step-down transformer is used on a 1000 V line to deliver 20 A at 120 V at the secondary coil. If the efficiency of the transformer is 80%, the current drawn from the line is:

### Choices

Choice (4) Response

a.

3 A

b.

2.4 A

c.

30 A

d.

0.3 A

## Question number: 765

MCQ▾

### Question

A 4 kg body and a 3 kg body are moving along the x-axis. At a particular instant the 2 kg body has a velocity of 3 ms -1 and the 3 kg body has the velocity of 2ms -1. The velocity of the center of mass at that instant is

### Choices

Choice (4) Response

a.

5 ms -1

b.

1 ms -1

c.

2.57

d.

None of the above