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BITSAT2010PhysicsCurrent ElectricityActual

The power dissipated in the circuit shown in the figure is 30 Watts. The value of R is

Options

  1. A20
  2. B15
  3. C10
  4. D30

Correct answer

C. 10

Step-by-step solution

P= V² R_ eq 1 R_ eq = 1 R + 1 5 = 5+R 5 R R_ eq = ( 5 R 5+R ) P=30 ~W Substituting the values in equation (i) 30= (10)² ( 5 R 5+R ) R=10

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