Physics-
General
Easy

Question

A 220V ac supply is connected between points A and B (Fig). What will be the potential difference V across the capacitor?

  1. 220V    
  2. 110V    
  3. 0V    
  4. 220square root of 2V    

The correct answer is: 220square root of 2V


    Capacitor once gets charged upto maximum potential After that for any other lesser value of p.d across A and B diode is reverse biased and it does not allow charge to flow in opposite direction
    From V subscript r m s end subscript equals fraction numerator V subscript m a x end subscript over denominator square root of 2 end fraction
    rightwards double arrow V subscript m a x end subscript equals V subscript r m s end subscript square root of 2
    equals 220 square root of 2 volts

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