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GUJCET · Physics · Alternating Current
In an AC circuit, current is 3 A and voltage 210 V and power is 63 W . The power factor is ____________ .
- A 0.11
- B 0.09
- C 0.08
- D 0.1
Answer & Solution
Correct Answer
(D) 0.1
Step-by-step Solution
Detailed explanation
(D) 0.1
\(
\begin{aligned}
\mathrm{P} & =\mathrm{VI} \cos \phi \\
\therefore \cos \phi & =\frac{\mathrm{P}}{\mathrm{VI}} \\
\therefore \cos \phi & =\frac{63}{3 \times 210} \\
\therefore \cos \phi & =0.1
\end{aligned}
\)
\(
\begin{aligned}
\mathrm{P} & =\mathrm{VI} \cos \phi \\
\therefore \cos \phi & =\frac{\mathrm{P}}{\mathrm{VI}} \\
\therefore \cos \phi & =\frac{63}{3 \times 210} \\
\therefore \cos \phi & =0.1
\end{aligned}
\)
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