# Electromagnetic Induction & Alternating Currents-Faraday's Law (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 1 - 3 of 8

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## Question number: 1

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

### Question

A bicycle wheel of radius 0.5 m has 32 spokes. It is rotating at the rate of 120 revolutions per minute, perpendicular to the horizontal component of earth’s magnetic field B H = 4 x 10 -5 tesla. The emf induced between the rim and the center of the wheel will be,

### Choices

Choice (4) Response

a.

6.0 x 10 -5 V

b.

4.8 x 10 -5 V

c.

6.28 x 10 -5 V

d.

1.6 x 10 -5 V

## Question number: 2

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

### Question

When a small piece of wire passes between the magnetic poles of a horse-shoe magnet in 0.1 sec, emf of 4 x 10 -3 volt is induced in it. The magnetic flux between the poles is,

### Choices

Choice (4) Response

a.

4 x 10 -3 weber

b.

4 x l0 -4 weber

c.

4 x 10 -6 weber

d.

4 x l0 -2 weber

## Question number: 3

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

### Question

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ shown in the fig, the speed of the ring is V. The potential difference developed across the semicircular ring is,

### Choices

Choice (4) Response

a.

and M is at higher potential

b.

π RBV and Q is at higher potential

c.

Zero

d.

2RBV and Q is at higher potential

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