# Electromagnetic Induction & Alternating Currents (AIIMS Physics): Questions 31 - 35 of 51

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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

## 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

## Question number: 33

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

### Question

The impedance of a circuit, when a resistance and a capacitor of capacitance are connected in series in an A. C. circuit of frequency 50 Hz is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 34

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 1997

MCQ▾

### Question

A coil of copper having 900 turns is placed in a magnetic field perpendicular to its plane. The cross sectional area of the coil is 0.5 m2. If it turns through 180° in 0.02 sec, then the induced emf in the coil is –

### Choices

Choice (4) Response

a.

135 V

b.

35 V

c.

0.4 V

d.

0.2 V

## Question number: 35

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

### Question

A conducting ring of radius 2 meter is placed in a uniform magnetic field B of 0.04 T, oscillating with frequency 500 Hz with its plane at right angles to magnetic field. What will be the induced electric field?

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page