Electromagnetic Induction & Alternating Currents (AIIMS Physics): Questions 22 - 25 of 51

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Question number: 22

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Appeared in Year: 2005

MCQ▾

Question

A 50 Hz a. c. source of 20 volts is connected across R and C as shown in figure below. The voltage across R is 12 volts. The voltage across C is – [AIIMS]

RC series circuit diagram

RC Series Circuit Diagram

In figure resistance R and capacitor C is connected in series, with 50 Hz a. c. source of 20 volts supply.

Choices

Choice (4) Response
a.

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

b.

8 V

c.

16V

d.

10 V

Question number: 23

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

A capacitor of capacitance 3µF 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

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 1amperesecond . The emf developing across the coil is –

Choices

Choice (4) Response
a.

6 V

b.

– 6 V

c.

12 V

d.

– 12 V

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 –

RC series circuit with 30 V power supply

RC Series Circuit With 30 v Power Supply

In figure resistance R and capacitor C is connected in series, with 50 Hz a. c. source of 30 volts supply.

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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