Physics-
General
Easy

Question

A battery is charged by a supply of 100 V as shown in figure. The charging current is 1.0A. the value of R is

  1. 88blank capital omega    
  2. 68blank capital omega    
  3. 44blank capital omega    
  4. None of these    

The correct answer is: 88blank capital omega


    Effective emf in circuit equals 100 minus 12 equals 88 V
    Current in circuit
    i equals fraction numerator e f f e c t i v e blank e m f over denominator r e s i s t a n c e end fraction equals fraction numerator 88 over denominator R end fraction
    Or R equals fraction numerator 88 over denominator i end fraction equals fraction numerator 88 over denominator 1 end fraction equals 88 capital omega

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