# Electromagnetic Induction & Alternating Currents (AIIMS (All India Institute of Medical Sciences) Physics): Questions 28 - 32 of 51

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## Question number: 28

» 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 4 mA, the voltage across the capacitor will be –

### Choices

Choice (4) Response

a.

0.18 V

b.

142 V

c.

0.21 V

d.

60.0 V

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## Question number: 29

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Appeared in Year: 2005

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

46 V

b.

90 V

c.

25 V

d.

9 V

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## Question number: 30

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

A coil of copper having 1600 turns is placed in a magnetic field perpendicular to its plane. The cross sectional area of the coil is 0.07 m2. If it turns through 180° in 0.04 sec, then the induced emf in the coil is –

### Choices

Choice (4) Response

a.

22.4 V

b.

2.24 V

c.

0.224 V

d.

224 V

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## Question number: 31

» Electromagnetic Induction & Alternating Currents » Self and Mutual Inductance

MCQ▾

### Question

The current passing through a choke coil of 9 H is decreasing at the rate of. The emf developing across the coil is –

### Choices

Choice (4) Response

a.

27 V

b.

-27 V

c.

3 V

d.

– 3.0 V

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## Question number: 32

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

### Question

The reactance of an inductance of 0.05H for 100 Hz A. C. is –

### Choices

Choice (4) Response

a.

31.4 Ω

b.

6.28 Ω

c.

3.14 Ω

d.

62.8 Ω

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