# Electromagnetic Induction & Alternating Currents (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 7 - 10 of 11

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

## Question number: 7

» Electromagnetic Induction & Alternating Currents » Lenz's Law

Appeared in Year: 2014

MCQ▾

### Question

Two identical metallic square loops L1 and L2 are placed next to each other with their sides parallel on a smooth horizontal table. Loop L1 is fixed and a current which increases as a function of time is passed through it. Then loop L2

### Choices

Choice (4) Response

a.

Remains stationary

b.

Moves towards L1

c.

Rotates about its center of mass

d.

Moves away from L1

## Question number: 8

» 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: 9

» 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

## Question number: 10

» Electromagnetic Induction & Alternating Currents » Faraday's Law

Appeared in Year: 2016

MCQ▾

### Question

Two infinitely long parallel wires carry current of magnitude and and are at a distance apart. The magnitude of the net magnetic field is found to reach a non – zero minimum value between the two wires and away from first wire. The ratio of the two currents and their mutual direction is –

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page