# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 662 - 667 of 2142

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## Question number: 662

MCQ▾

### Question

A circular arc of wire of radius of curvature r subtends an angle of radian at its center. If current i is flowing in it then the magnetic induction at its center is –

### Choices

Choice (4) Response

a.

b.

c.

d.

0

## Question number: 663

MCQ▾

### Question

A 6.28m long wire is turned into a coil of diameter 0.2m and a current of 1 amp is passed in it. The magnetic induction at its center will be –

### Choices

Choice (4) Response

a.

6.28 T

b.

6.28 x 10 -5 T

c.

0 T

d.

6.28 x 10 -3 T

## Passage

Read the passage given below and answer the questions that follow:

A wire carrying a 10 A current is bent to pass through sides of a cube of side 10 cm as shown in figure. A magnetic field T is present in the region. Then, find

## Question number: 664 (1 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The magnetic moment vector of the loop.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 665 (2 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The net torque on the loop is,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 666 (3 of 3 Based on Passage) Show Passage

MCQ▾

### Question

The net force on the loop

### Choices

Choice (4) Response

a.

F net = 0

b.

F net = (0.36k) N

c.

F net = (0.3i + 0.4k) N

d.

F net = (0.1i-0.2k) N

## Question number: 667

MCQ▾

### Question

A 10 cm long bar magnet of magnetic moment 1.34 Am 2 is placed in the magnetic meridian with its south pole pointing geographical south. The neutral point is obtained at a distance of 15 cm from the center of the magnet. Calculate the horizontal component of earth’s magnetic field.

### Choices

Choice (4) Response

a.

0.21 x 10 -4 T

b.

0.12 x 10 -4 T

c.

0.87 x 10 -7 T

d.

0.34 x 10 -4 T

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