Physics-
General
Easy

Question

The variation of the instantaneous current (I) and the instantaneous emf (E) in a circuit is as shown in fig. Which of the following statements is correct

  1. The voltage lags behind the current by pi / 2    
  2. The voltage leads the current by pi / 2    
  3. The voltage and the current are in phase    
  4. The voltage leads the current by pi    

The correct answer is: The voltage leads the current by pi / 2


    At t = 0, phase of the voltage is zero, while phase of the current is negative fraction numerator pi over denominator 2 end fraction i.e., voltage leads by fraction numerator pi over denominator 2 end fraction

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