Electromagnetic Induction & Alternating Currents-Faraday's Law (NEET Physics): Questions 4 - 7 of 8

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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

Question number: 5

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

Question

The magnetic flux passing perpendicular to the plane of the coil and directed into the paper is varying according to the relation 3t2+2t+3 , where is in milli-weber and t is in second. Then the magnitude of emf induced in the loop when t = 2 second is-

Choices

Choice (4) Response
a.

19 mV

b.

31 mV

c.

-14 mV

d.

-6 mV

Question number: 6

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

Question

A rectangular coil of size 10 cm x 20 cm has 60 turns. It is rotating about one of its diagonals in magnetic field 0.5 Wb/m 2 with a rate of 1800 revolution per minute. The induced e. m. f. in the coil can be,

(1) 111 V (2) 112 V

(3) 113 V (4) 114 V

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response
a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

1 and 2 are correct

Question number: 7

» Electromagnetic Induction & Alternating Currents » Faraday's Law

MCQ▾

Question

A copper disc of radius 0.1 m rotates about its center with 10 revolution per second in a uniform magnetic field of 0.1 T. The emf induced across the radius of the disc is –

Choices

Choice (4) Response
a.

20πmV

b.

π10V

c.

10πmV

d.

2π10V

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