Home
Class 12
PHYSICS
Radius of a circular ring is changing wi...

Radius of a circular ring is changing with time and the coil is placed in uniform magnetic field perpendicular to its plane. The variation of 'r' with time 't' is shown in Fig. Then induced emf e with time t will be best represented by

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
B
`e=(BdA)/(dt)=(Bd)/(dt)(pir^(2)) =B2pir(dr)/(dt)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    RESONANCE|Exercise Exercis-2 PART 2|17 Videos

  • ELECTROMAGNETIC INDUCTION

    RESONANCE|Exercise Exercis-2 PART 3|10 Videos

  • ELECTROMAGNETIC INDUCTION

    RESONANCE|Exercise Exercis-1 PART 2|51 Videos

  • ELECTRODYNAMICS

    RESONANCE|Exercise Advanced level problems|31 Videos

  • ELECTROSTATICS

    RESONANCE|Exercise HLP|39 Videos

Similar Questions

Explore conceptually related problems

A flexible wire bent in the form of a circle is placed in a uniform magnetic field perpendicular to the plane of the coil. The radius of the coil changing as shown in figure. The graph of induced emf in the coil is represented by

A flexible wire bent in the form of a circle is place in a uniform magnetic field perpendicularly to the plane of the coil. The radius of the coil changes as shown in Figure. The graph of magnetude of induced emf in the coil is represented by

The current i in a coil varies with time as shown in the figure. The variation of induced emf with time would be

A current (I) carrying circular wire of radius R is placed in a magnetic field B perpendicular to its plane. The tension T along the circumference of the wire is

A rectangular coil is placed in a region having a uniform magnetic field B perpendicular to the plane of the coil. An emf will not be induced ion the coil if the

A conducting ring is placed in a uniform magnetic field with its plane perpendicular to the field . An emf is induced in the ring if

Find the emf induced in the coil shown in figure.The magnetic field is perpendicular to the plane of the coil and is constant.

Find the emf induced in the coil shown in figure. The magnetic field is perpendicular to the plane of the coil and is constant.