In an ac circuit, potential difference across an inductance and resistance joined in series are resp

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7.Alternating Current

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In an $ac$ circuit, the potential difference across an inductance and resistance joined in series are respectively $16\, V$ and $20 \,V$. The total potential difference across the circuit is.......$V$

A

$20$

B

$25.6$

C

$31.9$

D

$53.5$

Solution

(b) $V = \sqrt {V_R^2 + V_L^2} = \sqrt {{{(20)}^2} + {{(16)}^2}} = \sqrt {656} = 25.6\,\,V$

Standard 12

Physics

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