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If a wattless current flows in an a.c. circuit, the circuit is

Asked in JEE Main 25th June 1st Shift 2022 · Wattless current

(1) a purely resistive circuit
(2) a purely inductive circuit
(3) an LCR series circuit
(4) an RC series circuit only

Answer: (2) a purely inductive circuit

Step-by-step solution

Wattless current carries zero average power, which needs a 90° phase between current and voltage.

Only a purely reactive element does this; among the options, the purely inductive circuit.

Why the other options are wrong

(1) A resistor gives maximum power, the opposite of wattless.
(3) An LCR circuit has a resistive part, so power is dissipated.
(4) An RC circuit dissipates power in R.

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