A) \[0\]
B) \[0.5\]
C) \[\frac{1}{\sqrt{2}}\]
D) \[1\]
Correct Answer: B
Solution :
: Average power dissipated in A.C. circuit is \[P={{I}^{2}}Z\,\cos \phi \] where \[\cos \phi \] is the power factor of the circuit. \[\therefore \] \[\cos \phi =\frac{P}{{{I}^{2}}Z}\] Here, \[P=2W,\,\,I=2A,\,\,Z=1\Omega \] \[\therefore \] \[\cos \phi =\frac{2}{{{(2)}^{2}}(1)}=\frac{1}{2}=0.5\]
You need to login to perform this action.
You will be redirected in
3 sec
