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Energy Stored in an Inductor

A short circu...

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A short circuited coil is placed in time varying magnetic field electric power is dissipated due to the current induced in coil if the number of turn were to be quadrupled and the wire radius halved the electric power dissipated would b

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Q. A short-circuited coil is placed in a time-varying magnetic field. Electrical power is dissipated due to the current induced in the coil. If the number of turns were to be quadrupled and the wire radius halved, the electrical power dissipated would be :

n

turns and radius

r

is placed in a magnetic field. The electrical power is dissipated due to the current induced in the coil. By stretching the wire, if the number of turns were to be quadrupled and the wire radius halved, the electrical power dissipated would be :

Q. A circular coil of radius

R

carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at distance

x (x >>> R)

is measured. If the current in coil is halved and distance of the point at axis is doubled, the new magnetic field will be:

Q. A flat coil of radius 5 cm with 50 turns has a resistance of 0.16

Ω

and is placed in a magnetic field oriented normal to the plane of the coil. The magnetic field varies at a constant rate in time. By switching the magnetic field on at t = 0 s, the rate of heat dissipated in the coil is found to be

0.49 J s^{- 1}

. Then choose the correct options from the following.

Q. A circular coil of radius

8.0

c m

20

turns rotates about its vertical diameter with an angular speed of

50

m / s^{- 1}

in a uniform horizontal magnetic field of magnitude

3 \times 10^{- 2}

T

. Obtain the maximum and average emf induced in the coil. If the coil forms a closed loop of resistance

10

Ω

. How much power is dissipated as heat?

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Energy Stored in an Inductor

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