Electromagnetic Induction & Alternating Currents-Induced EMF and Current (NEET Physics): Questions 10 - 12 of 12

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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: 10 (2 of 2 Based on Passage) Show Passage

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

Question

The e. m. f. induced in the closed loop is

Choices

Choice (4) Response

a.

μ0I0a2πln(2a+ll)

b.

μ0I0a2πln(2all)

c.

μ0I0aπln(a+ll)

d.

2μ0I0aπln(a+ll)

Question number: 11

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Assertion-Reason▾

Assertion (Ꭺ)

The induced e. m. f. and current will be same in two identical loops of copper and aluminum, when rotated with same speed in the same magnetic field.

Reason (Ꭱ)

Induced e. m. f. is proportional to rate of change of magnetic field while induced current depends on resistance of wire.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

Question number: 12

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

Question

A current increases uniformly from zero to one ampere in 0.01 second, in a coil of inductance 10 mH. The induced e. m. f. will be –

Choices

Choice (4) Response

a.

3 V

b.

4V

c.

1 V

d.

2 V

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