In an A.C. circuit, resistance = 12Omega...

In an A.C. circuit, resistance = 12`Omega` and capacitance reactance = 9`Omega` are connected in series, then the value of impedance of a circuit will be ..........

A

`15Omega`

B

`21Omega`

C

`3Omega`

D

`3sqrt7Omega`

Text Solution

Verified by Experts

The correct Answer is:

A

In a series of R-C ,
`|Z|=sqrt(R^2+X_C^2)=sqrt(12^2+9^2)=sqrt225=15Omega`

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