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Both the inductors and the cell are ideal. Find the current (in Amperes) $2 H$ inductance in steady state.

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Important Questions on Electromagnetic Induction

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#1>Q 45

A metallic square wire frame $A B C D$ of side a is moving with a constant velocity $v$ in a uniform magnetic field $B$ as shown. The emf induced between points $A$ and $C$ is :

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#2>Q 1

For a domestic

AC

supply of

220 V

50

cycles per second, the potential difference between the terminals of a two -pin electric outlet in a room is given by:

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#2>Q 2

When the armature coil in a motor rotates in a magnetic field, a back emf

ε

develops opposing the applied potential

v

, causing a net current

I

in the coil. If

R

is the resistance the coil, the mechanical power output of the motor is -

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#2>Q 3

In an oscillating

L C

circuit with negligible resistance, at a certain instant, energy is fully stored in the capacitor. The least time it takes for the energy to be equally shared between the capacitor and the inductor is

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#2>Q 4

In an electric motor, two parallel wires

60 cm

long are separated by a distance of

1.5 cm

. The wires have non-magnetic insulation between them. A short circuit in the motor results suddenly in a large current of

4000 A

. The currents flow in opposite directions in the two wires. Then

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#2>Q 5

A resistor

R

and a capacitor

C

are connected in series to a

220 V, 50 Hz

AC source. Let

V_{R}

and

V_{C}

be the

R M S

voltages across

R

and

C

respectively. Then

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#2>Q 6

A conducting rod of length

80 cm

rotates with one end fixed at the centre of a circular metallic ring and the other end in contact with the ring. The angular frequency of the rod is

300 s^{- 1}

. There is a uniform and constant magnetic field of

1.0 T

parallel to the axis of rotation. The emf developed between the centre and the ring is

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Practice Book for KVPY Aptitude Test - Stream SX Physics>Chapter 6 - Electromagnetic Induction>Exercise#2>Q 7

A small rectangular loop of wire in the plane of the paper is moved with uniform speed across a limited region of uniform magnetic field perpendicular to the plane of the paper, as shown.

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Which graph would best represent the variation of the electric current, $I$ , in the wire with time $t$ ?

Both the inductors and the cell are ideal. Find the current (in Amperes) 2 H inductance in steady state.

Important Questions on Electromagnetic Induction

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Both the inductors and the cell are ideal. Find the current (in Amperes) $2 H$ inductance in steady state.