# Electromagnetic Induction & Alternating Currents-Faraday's Law (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 5 - 8 of 8

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## 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 , 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.

b.

c.

d.

## Question number: 8

» 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 , 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.

-6 mV

b.

31 mV

c.

19 mV

d.

-14 mV

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