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Question: Answered & Verified by Expert
An alternating voltage is connected in series with a resistance $R$ and an inductance $L$ If the potential drop across the resistance is $200 \mathrm{~V}$ and across the inductance is $150 \mathrm{~V}$, then the applied voltage is
PhysicsAlternating CurrentJEE Main
Options:
  • A $350 \mathrm{~V}$
  • B $250 \mathrm{~V}$
  • C $500 \mathrm{~V}$
  • D $300 \mathrm{~V}$
Solution:
2682 Upvotes Verified Answer
The correct answer is: $250 \mathrm{~V}$
The applied voltage is given by $V=\sqrt{V_R^2+V_L^2}$ $V=\sqrt{(200)^2+(150)^2}=250 \mathrm{volt}$

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