The resistance that must be connected in series with inductance of \( 0.2 \mathrm{H} \) in order...

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The resistance that must be connected in series with inductance of \( 0.2 \mathrm{H} \) in order that the phase difference
\( \mathrm{P} \)
between current and e.m.f. may be \( 45^{\circ} \) when the
W
frequency is \( 50 \mathrm{~Hz} \), is:-
(1) \( 6.28 \mathrm{ohm} \).
(2) \( 62.8 \mathrm{ohm} \).
(3) \( 628 \mathrm{ohm} \).
(4) \( 31.4 \mathrm{ohm} \).
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