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.   \[\omega L/R\] 
D.   \[R/{{({{R}^{2}}-{{\omega }^{2}}{{L}^{2}})}^{1/2}}\]
Answer» C.   \[\omega L/R\] 


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