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An L- C - R series circuit is joined to ...

An L- C - R series circuit is joined to a source of alternating e.m.f. If R = `9 Omega, X_L` = `28 Omega`, X_c = 16 W, then the impedance of the circuit will be

A

`10 Omega`

B

`15 Omega`

C

`20 Omega`

D

`30 Omega`

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