Electromagnetic Induction & Alternating Currents-Electromagnetic Induction (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 1 - 3 of 3

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Question number: 1

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

Appeared in Year: 2011

MCQ▾

Question

A rectangular loop of wire shown below is coplanar with a long wire carrying current I.

A current carrying wire with a rectangular loop of wire

A Current Carrying Wire With a Rectangular Loop of Wire

In figure a rectangular loop of wire is shown, which is coplanar with a long wire carrying current I.

The loop is pulled to the right as indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and the right sides of the loop?

Choices

Choice (4) Response

a.

Induced current → Clockwise, Force on left side → To the left, Force on right side → To the right

b.

Induced current → Counterclockwise, Force on left side → To the right, Force on right side → To the left

c.

Induced current → Clockwise, Force on left side → To the right, Force on right side → To the left

d.

Induced current → Counterclockwise, Force on left side → To the left, Force on right side → To the right

Question number: 2

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

MCQ▾

Question

A long vertical wire carrying current i produces a neutral point with the earth’s magnetic field at 10 cm from the wire. If the horizontal component of the earth’s magnetic field is 0.18 gauss, the current in the wire is –

Choices

Choice (4) Response

a.

0.50 A

b.

4.5 A

c.

5 A

d.

50 A

Question number: 3

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

MCQ▾

Question

A long vertical wire carrying current i produces a neutral point with the earth’s magnetic field at 7 cm from the wire. If the horizontal component of the earth’s magnetic field is 0.18 gauss, the current in the wire is –

Choices

Choice (4) Response

a.

12.6 A

b.

63 A

c.

6.3 A

d.

0.63 A

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