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Assertion: half the energy drawn from a source is lost when charging a capacitor through a resistor. Reason: the loss is proportional to the resistance in the circuit.

  • A.both the assertion and the reason are true and the reason explains the assertion
  • B.both the assertion and the reason are true but the reason does not explain the assertion
  • C.the assertion is false although the reason offered is a true statement in itself
  • D.the assertion is true but the reason given for it is false

Answer: D

The loss is exactly half whatever the resistance, because a smaller resistance simply makes a larger current flow for a shorter time. The reason given is therefore false, though the assertion it accompanies is a standard and correct result.

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