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Q.

Current in a circuit is wattles if

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a

Inductance in the circuit is zero

b

Resistance in the circuit is zero

c

Current is alternating

d

Resistance and inductance both are zero

answer is B.

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Detailed Solution

If R⇒cosϕ=0⇒ϕ=900 so P=0, in this case power loss is zero & current flowing in the circuit is called wattles current
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Current in a circuit is wattles if