Physics-
General
Easy

Question

Calculate the value E, for given circuit, when value of 2A current is either flowing in clockwise or anticlockwise direction

  1. 32 V, 8V    
  2. 38V, 2V    
  3. 32V, 2V    
  4. 30V, 8V    

The correct answer is: 32 V, 8V


    Given current I equals 2 A

    (i) If current is in clockwise direction then from Kirchhoff’s second law
    6 cross times 2 plus 20 minus E equals 0
    ⟹ E equals 32 V
    (ii) If the current is in anticlockwise direction, then
    6 cross times 2 plus E minus 20 equals 0
    ⟹ E minus 8 equals 0
    E=8

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