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NTA Abhyas JEE Main2020PhysicsAlternating CurrentPractice

An ac source of 50   V (r.m.s value) is connected across a series R - C circuit. If the r.m.s voltage across the resistor is 40   V , then the r.m.s voltage across the capacitor is

Options

  1. A10   V
  2. B20   V
  3. C30   V
  4. D40   V

Correct answer

C. 30   V

Step-by-step solution

For an R - C circuit Applied voltage, V = V R 2 + V C 2 ∴ 50 = 40 2 + V C 2 ⇒ V C = 30 V

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