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Electromagnetic induction

Electromagnetic induction
A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is

250 mH
3500 mH
None of the listed here
350 mH

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Electromagnetic induction
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will

None of the listed here
Decreases
Increases
Remains same

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Electromagnetic induction
Which of the following is not a unit of inductance?

Volt second per ampere
Coulomb/volt ampere
Hennry
All of the listed here

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Electromagnetic induction
The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be

3 mH
24 mH
48 mH
12 mH

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Electromagnetic induction
For a purely inductive circuit which of the following is true?

Any capacitance even if present in the circuit will not be charged
Actual power of the circuit is zero
Apparent power is zero
Relative power is zero

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Electromagnetic induction
Which of the following inductor will have the least eddy current losses?

Laminated iron core
Powdered iron core
Air core
Iron core

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