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NEETPhysicsCurrent Electricity

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : When an extemal resistor of resistance R (connected across a cell of internal resistance r) is varied, power consumed by resistance (R ) is maximum when (R=r ). Reason (R) : Power consumed by a resistor of constant resistance R is maximum when current through it is maximum. In the light of the abo

Options

  1. ABoth (A) and (R) are true and (R) is the correct explanation of (A).
  2. BBoth (A) and (R) are true and (R) is NOT the correct explanation of (A).
  3. C(A) is true but (R) is false.
  4. D(A) is false but (R) is true.

Correct answer

C. (A) is true but (R) is false.

Step-by-step solution

- Assertion (A): The power consumed by an external resistor (R ) connected to a cell of internal resistance (r ) is maximum when (R= ). This is known as the condition for maximum power transfer, where the external resistance is equal to the internal resistance of the power source. So, Assertion (A) is true. - Reason (R): Power consumed by a resistor is not necessarily maximum when the current through it is maximum. In fact, if the current is maximum, that typically means (R ) is very small, leading to lower power c

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