Electromagnetic Induction & Alternating Currents (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 4 of 9

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Question number: 1

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Appeared in Year: 2010

MCQ▾

Question

The circuit shown consists of a switch (S), a battery (B) of emf E, a resistance R, and an inductor L.

A circuit diagram consist of switch, a battery, a resistance R

A Circuit Diagram Consist of Switch, a Battery, a Resistance R

In figure a RL circuit is shown in which a battery (B) of emf E, a switch (S), a resistor (R) and an inductor (L) are connected in series.

The current in the circuit at the instant the switch is closed is –

Choices

Choice (4) Response

a.

ER(1e)

b.

c.

ER

d.

0

Question number: 2

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

Appeared in Year: 2011

MCQ▾

Question

For a domestic AC supply of 220 V at 50 cycles per second, the potential difference between the terminals of a two pin electric outlet in a room is given by –

Choices

Choice (4) Response

a.

V(t)=2202cos(100πt)

b.

V(t)=2202cos(50t)

c.

V(t)=220cos(50t)

d.

V(t)=220cos(100πt)

Question number: 3

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Appeared in Year: 2010

MCQ▾

Question

Consider the infinite ladder circuit shown below.

 The infinite ladder circuit of capacitor C and inductor L.

the Infinite Ladder Circuit of Capacitor C and Inductor L.

In figure the infinite ladder circuit of capacitor C and inductor L is shown.

For which angular frequency ω will the circuit behave like a pure inductance?

Choices

Choice (4) Response

a.

2LC

b.

1LC

c.

2LC

d.

LC2

Question number: 4

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

Appeared in Year: 2011

MCQ▾

Question

A rectangular loop of wire shown below is coplanar with a long wire carrying current I.

A current carrying wire with a rectangular loop of wire

A Current Carrying Wire With a Rectangular Loop of Wire

In figure a rectangular loop of wire is shown, which is coplanar with a long wire carrying current I.

The loop is pulled to the right as indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and the right sides of the loop?

Choices

Choice (4) Response

a.

Induced current → Clockwise, Force on left side → To the left, Force on right side → To the right

b.

Induced current → Counterclockwise, Force on left side → To the right, Force on right side → To the left

c.

Induced current → Clockwise, Force on left side → To the right, Force on right side → To the left

d.

Induced current → Counterclockwise, Force on left side → To the left, Force on right side → To the right

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