The power factor of an ac circuit having resistance (R) and inductance – McqOptions

MCQOPTIONS

1.	The power factor of an ac circuit having resistance (R) and inductance (L) connected in series and an angular velocity \[\omega \] is [AIEEE 2002; MP PET 2000]
A.	\[R/\omega L\]
B.	\[R/{{({{R}^{2}}+{{\omega }^{2}}{{L}^{2}})}^{1/2}}\]
C.	4r
D.	\[R/{{({{R}^{2}}-{{\omega }^{2}}{{L}^{2}})}^{1/2}}\]
Answer» C. 4r

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