An alternating voltage is connected in series with a resistance R and an inductance L If potential d

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7.Alternating Current

easy

An alternating voltage is connected in series with a resistance $R$ and an inductance $L$ If the potential drop across the resistance is $200\, V$ and across the inductance is $150 \,V,$ then the applied voltage is.......$V$

A

$350$

B

$ 250$

C

$500$

D

$300$

Solution

(b)The applied voltage is given by $V = \sqrt {V_R^2 + V_L^2} $
$V = \sqrt {{{(200)}^2} + {{(150)}^2}} $$ = 250\;volt$

Standard 12

Physics

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