Q113 / 125 · BITSAT 2020 · Physics

In series combination of $R, L$ and $C$ with an A.C. source at resonance, if $\mathrm{R}=20 \mathrm{ohm},$ then impedence $Z$ of the combination is

Correct answer
A
$20 \mathrm{ohm}$
B
zero
C
10 ohm
D
$400 \mathrm{ohm}$

Hence, the correct answer is option: 'A'.

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