Electromagnetic Induction & Alternating Currents (AIIMS Physics): Questions 13 - 17 of 51

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Question number: 13

» Electromagnetic Induction & Alternating Currents » Lenz's Law

Appeared in Year: 1982

MCQ▾

Question

As shown in the figure, a copper coil A and a wire are placed on the surface of the paper. A current of 1A flows in the wire in the directions as shown in the figure. If the magnitude of the current is raised to 2 A, the direction of the induced current in the coil [AIIMS, RPMT-88]

A copper coil A and a wire

A Copper Coil a and a Wire

Figure shows a copper coil A and a wire are placed on the surface of the paper.

Choices

Choice (4) Response
a.

No current will induced

b.

Clock wise

c.

Anti clock wise

d. None of the above

Question number: 14

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Appeared in Year: 1995

MCQ▾

Question

The reactance of an inductance of 0.01H for 50 Hz A. C. is – [AIIMS]

Choices

Choice (4) Response
a.

0.84 Ω

b.

3.14 Ω

c.

1.57 Ω

d.

6.28 Ω

Question number: 15

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

Appeared in Year: 1996

MCQ▾

Question

To induce an emf in a coil, the magnetic flux linking [AIIMS]

Choices

Choice (4) Response
a.

Must remain constant

b.

Must increase

c.

Must decrease

d.

Can either increase or decrease

Question number: 16

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

Appeared in Year: 1982

MCQ▾

Question

The current passing through a choke coil of 5 H is decreasing at the rate of 2amperesecond . The emf developing across the coil is – [CPMT, MPPMT-90, AIIMS-97]

Choices

Choice (4) Response
a.

2.5 V

b.

– 10 V

c.

10 V

d.

– 2.5 V

Question number: 17

» Electromagnetic Induction & Alternating Currents » Alternating Currents

Appeared in Year: 1997

MCQ▾

Question

In an A. C. circuit containing only capacitance, the current – [AIIMS]

Choices

Choice (4) Response
a.

Lags the voltage by 90°

b.

Leads the voltage by 180°

c.

Leads the voltage by 90°

d.

Remains in phase with the voltage

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