Magnetic Effects of Current and Magnetism-Biot - Savart Law (AIIMS 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 0.5×105Wbm2 . 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 r>>R varies as – [AIIMS]

Choices

Choice (4) Response
a.

1r3

b.

1r2

c.

1r

d.

1r32

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.

2.0×104T

b.

0.9×103T

c.

2.9×104T

d.

1.9×103T

Question number: 7

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

MCQ▾

Question

The earth’s magnetic field at a given point is 0.4×105Wbm2 . 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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