An inductive circuit contains resistance of 10 Ω and an inductance of 20, H . If an ac volta

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7.Alternating Current

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An inductive circuit contains resistance of $10$ $\Omega$ and an inductance of $20\, H$. If an $ac$ voltage of $120 \,V$ and frequency $60\, Hz$ is applied to this circuit, the current would be nearly

A

$0.32\, amp$

B

$0.016\, amp$

C

$0.48\, amp$

D

$0.80 \,amp$

Solution

(b)$i = \frac{V}{{\sqrt {{R^2} + {\omega ^2}{L^2}} }} = \frac{{120}}{{\sqrt {100 + 4{\pi ^2} \times {{60}^2} \times {{20}^2}} }}$ $=0.016 \,A$

Standard 12

Physics

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