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NEET2011PhysicsCurrent ElectricityActual

If power dissipated in the 9 resistor in the circuit shown is 36 ~W , the potential difference across the 2 resistor is

Options

  1. A8 ~V
  2. B10 ~V
  3. C2 ~V
  4. D4 ~V

Correct answer

B. 10 ~V

Step-by-step solution

Electric power, P=i^2 R Current, i= P R For resistance of 9 i₁= 36 9 = 4 =2 ~A aligned i₂ & = i₁ R 6 = 2 9 6 =3 ~A i & =i₁+i₂=2+3=5 ~A V₂ & =I R₂=5 2=10 ~V aligned

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