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NEET2010PhysicsCurrent ElectricityActual

Assertion : It is advantageous to transmit electric power at high voltage. Reason : High voltage implies high current.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false

Step-by-step solution

As P=V i , hence for the transmission of same power, high voltage implies less current. Therefore heat energy loses (H=i^2 R t / 4.2 ) are minimized if power is transmitted at high voltage.

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