Electromagnetic Induction & Alternating Currents (AIIMS (All India Institute of Medical Sciences) Physics): Questions 23 - 27 of 51

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Question number: 23

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

A capacitor of capacitance is connected in the tank circuit of an oscillator oscillating with a frequency of 2 kHz. If the current flowing in the circuit is 5 mA, the voltage across the capacitor will be –

Choices

Choice (4) Response

a.

0.133 V

b.

0.165 V

c.

81.5 V

d.

159 V

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Question number: 24

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

MCQ▾

Question

The current passing through a choke coil of 12 H is decreasing at the rate of. The emf developing across the coil is –

Choices

Choice (4) Response

a.

6 V

b.

– 6 V

c.

12 V

d.

– 12 V

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Question number: 25

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

A 50 Hz a. c. source of 30 volts is connected across R and C as shown in figure below. The voltage across R is 13 volts. The voltage across C is nearly –

Choices

Choice (4) Response

a.

15 V

b.

27V

c.

30 V

d.

Not possible to determine unless values of R and C are given

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Question number: 26

» Electromagnetic Induction & Alternating Currents » Alternating Currents

MCQ▾

Question

In an A. C. circuit containing only inductor, the voltage –

Choices

Choice (4) Response

a.

Leads the current by 180°

b.

Leads the current by 90°

c.

Lags the current by 90°

d.

Remains in phase with the voltage

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Question number: 27

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

The primary winding of a transformer has 750 turns whereas its secondary has 8250 turns. The primary is connected to a supply of 50 V, 50 Hz. The secondary will have an output of –

Choices

Choice (4) Response

a.

11 V, 50 Hz

b.

5 V, 5 Hz

c.

550 V, 50 Hz

d.

550 V, 500 Hz

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