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Self Induction

A short circu...

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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 wire radius halved,the electrical power dissipated would be 1=halved 2=same 3=doubled 4=quadrupled

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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

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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 current is flowing in a circuit consisting of a resistor and a battery.
What happens to the power dissipated in the resistor when the resistance is quadrupled and the voltage remains constant?

Q. A circular coil of radius

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in a uniform horizontal magnetic field of magnitude

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

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. How much power is dissipated as heat?

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