# Magnetic Effects of Current and Magnetism-Ampere's Law (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 4 - 7 of 10

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## Question number: 4

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

### Question

A solenoid of length 0.2m has 500 turns on it. If 8.71 x 10 -6 Weber/m 2 be the magnetic field at an end of the solenoid, then the current flowing in the solenoid is –

### Choices

Choice (4) Response

a.

A

b.

c.

d.

## Question number: 5

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

### Question

If a coil carrying current is placed in uniform magnetic field, then

(1) emf is produced

(2) torque is produced

(3) force is produced

(4) torque is not produced

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1 and 3 are correct

c.

2 and 4 are correct

d.

1, 2 and 3 are correct

## Question number: 6

» Magnetic Effects of Current and Magnetism » Ampere's Law

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

## Question number: 7

» Magnetic Effects of Current and Magnetism » Ampere's Law

MCQ▾

### Question

A wire of length L carrying current I is bent into a circle of one turn. The field at the center of the coil is B 1, A similar wire of length L carrying current I is bent into a square of one turn. The field at its center is B 2. Then which of the followings are not correct?

(1) B 1 > B 2

(2) B 1 = B 2

(3)

(4) B 1 < B 2

Select the correct answers and mark it according to the following codes:

### Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1, 2 and 3 are correct

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