# Magnetic Effects of Current and Magnetism-Biot - Savart Law (AIIMS (All India Institute of Medical Sciences) Physics): Questions 4 - 7 of 7

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## Question number: 4

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

Appeared in Year: 2003

MCQ▾

### Question

The earth’s magnetic field at a given point is. This field is to be annulled by magnetic induction at the center of a circular conducting loop of radius 5.0 cm. The current required to be flown in the loop is nearly: [AIIMS]

### Choices

Choice (4) Response

a.

0.4 A

b.

0.2 A

c.

40 A

d.

4 A

## Question number: 5

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

Appeared in Year: 2004

MCQ▾

### Question

A circular coil of radius R carries an electric current. The magnetic field due the coil at a point on the axis of the coil located at a distance r from the center of the coil, such that varies as – [AIIMS]

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 6

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

### Question

A closely wound flat circular coil of 30 turns of wire has diameter of 12 cm and carries a current of 6 ampere. Determine the magnetic flux density at the centre of the coil:

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 7

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

### Question

The earth’s magnetic field at a given point is. This field is to be annulled by magnetic induction at the center of a circular conducting loop of radius 8.0 cm. The current required to be flown in the loop is nearly:

### Choices

Choice (4) Response

a.

50 A

b.

0.5 A

c.

0.25 A

d.

5 A

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