A) 0.80
B) 0.56
C) 0.33
D) 0.64
Correct Answer: A
Solution :
Given, \[\operatorname{X}=32\,\,\Omega ,\,\,{{X}_{C}}=26\,\,\Omega ,\,\,R=8\,\,\Omega \] Impedance \[Z\,\,=\,\,\sqrt{({{R}^{2}})+{{({{X}_{L}}-{{X}_{C}})}^{2}}}\] \[=\,\,\sqrt{{{(8)}^{2}}+{{(32-26)}^{2}}}\] \[=\,\,\,\sqrt{64+36}\] \[=\,\,\,10\,\,\Omega \] \[\therefore \] Power factor \[\cos \,\,\phi \,\,=\,\,\frac{R}{Z}=\frac{8}{10}=0.8\]You need to login to perform this action.
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