A) \[20\text{ }\Omega \]
B) \[\text{15 }\Omega \]
C) \[\text{30 }\Omega \]
D) \[\text{21}\text{.13 }\Omega \]
Correct Answer: D
Solution :
(d) \[\text{21}\text{.13 }\Omega \] Impedance, \[Z=\sqrt{{{R}^{2}}+{{\left( {{X}_{L}}-{{X}_{C}} \right)}^{2}}}\] \[=\sqrt{{{(12)}^{2}}+{{(31.4-14)}^{2}}}=21.13\,\Omega \]
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