Electromagnetic Induction & Alternating Currents (NEET Physics): Questions 51 - 54 of 121

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Question number: 51

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

MCQ▾

Question

A conducting wire in the shape of Y with each side of length l is moving in a uniform magnetic field B, with a uniform speed v as shown in fig. The induced emf at the two ends X and Y of the wire will be-

 A conducting wire shape of Y in uniform magnetic field

a Conducting Wire Shape of Y in Uniform Magnetic Field

A conducting wire in the shape of Y with each side of length l is placed in uniform magnetic field B.

Choices

Choice (4) Response
a.

Zero

b.

2 Blv sin (θ/2)

c.

2 Blv

d.

2 Blv cos (θ/2)

Question number: 52

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

MCQ▾

Question

Two circular coils can be arranged in any of the three situations shown in the figure. Their mutual inductance will be

Circular coils in different situation

Circular Coils in Different Situation

n figure two circular coils arranged in three different situation.

Choices

Choice (4) Response
a.

Maximum in situation A

b.

Maximum in situation C

c.

Maximum in situation B

d.

The same in all situations

Question number: 53

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

Question

A solenoid has an inductance of 50 mH and a resistance of 0.025 Ω. If it is connected to a battery, how long will it take for the current to reach one half of its final equilibrium value?

Choices

Choice (4) Response
a.

1.38 sec

b.

1.38 ms

c.

0.23 sec

d.

1.34 sec

Passage

Read the passage given below and answer the questions that follow:

In Figure given, there is a conducting loop ABCDEFA, of resistance per unit length placed near a long straight current-carrying wire. The dimensions are shown in the figure. The long wire lies in the plane of the loop. The current in the long wire varies as I = I 0 t.

Conducting loop ABCDEFA

Conducting Loop ABCDEFA

In figure a conducting loop ABCDEFA placed near a long straight current carrying wire.

Question number: 54 (1 of 3 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

MCQ▾

Question

The mutual inductance of the pair is

Choices

Choice (4) Response
a.

2μ0aπln(a+ll)

b.

μ0aπln(a+ll)

c.

μ0a2πln(2all)

d.

μ0a2πln(2a+ll)

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