Question

3. The maximum power is transferred by a d. c. source of internal resistance (Ri) to an external
resistance (Rp) if
b) R=Ri
c) R=RE
d) R = 2R,

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Answer 1

Answer:

Option B (R=Ri) is the right choice for the given question.

Explanation:

The solution can be justified by the Maximum Power Transfer Theorem.

Maximum Power Transfer Theorem states that in order to achieve the maximum output power from the circuit the internal resistance of the battery (Ri) should be equivalent to the external resistance of the circuit .

This external resistance can be a single load or in case of multiple resistances the equivalent of all the resistances is considered for external resistance.

Hence, (R=Ri) is the condition to achieve maximum output power from the circuit.