Electromagnetic Induction & Alternating Currents-Faraday's Law (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 4 of 8

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

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,

A thin semicircular ring in magnetic field

A Thin Semicircular Ring in Magnetic Field

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 figure.

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

Question number: 4

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

Question

An airplane having a distance of 50 meter between the edges of its wings is flying horizontally with a speed of 360km/hour. If the vertical component of earth’s magnetic field is 4 x 10 -4 weber/m 2, then the induced emf between the edges of its wings will be -

Choices

Choice (4) Response

a.

2 V

b.

0.2 V

c.

2 mV

d.

20 V

f Page
Sign In