Physics-
General
Easy

Question

Potential difference between the points P and Q in the electric circuit shown is

  1. 4.5 V    
  2. 1.2 V    
  3. 0.1 v    
  4. 2.88 V    

The correct answer is: 2.88 V


    Equivalent resistance between P and Q
    fraction numerator 1 over denominator R subscript P Q end subscript end fraction equals fraction numerator 1 over denominator left parenthesis 6 plus 2 right parenthesis end fraction plus fraction numerator 1 over denominator 3 end fraction plus fraction numerator 1 over denominator left parenthesis 4 plus 12 right parenthesis end fraction Þ R subscript P Q end subscript equals fraction numerator 48 over denominator 25 end fraction capital omega
    Current between P and Q; i = 1.5A
    So, potential difference between P and Q
    V subscript P Q end subscript equals 1.5 cross times fraction numerator 48 over denominator 25 end fraction equals 2.88 V.

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