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KCET2016PhysicsCurrent Electricity

Two heating coils of resistances ( 10 ) and ( 20 ) are connected in parallel and connected to a battery of emf ( 12 ~V ) and internal resistance ( 1 ). The power consumed by them are in the ratio

Options

  1. A1: 4
  2. B( 1: 3 )
  3. C( 1 )
  4. D( 04: 1 )

Correct answer

C. ( 1 )

Step-by-step solution

Since the resistors are connected in parallel, then potential difference across each resistor is same. Power is given as [ array l P= V² R P 1 R P₁ P₂ = R₂ R₁ P₁ P₂ = 20 10 = 2 1 array ] Therefore, the power consumed by them are in the ratio ( 2: 1 ).

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