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

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

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Electromagnetic induction
A laminated iron core has reduced eddy-current losses because

The laminations are insulated from each other
The magnetic flux is concentrated in the air gap of the core
The laminations are stacked vertically
More wire can be used with less D.C. resistance in coil

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