A student has been tasked to get maximum power dissipation by different dry cells in alaboratory. To fulfill this task, s/he should keep in mind that the effective internal resistance MUST beI. equal to the external resistanceII. less than the external resistanceIII. more than the external resistance
Correct answer: A. I only.
- A. I only.
- B. III only.
- C. I and II.
- D. I and III.
Explanation
To achieve maximum power dissipation in an external resistance connected to a dry cell with internal resistance, the effective internal resistance of the cell MUST be equal to the external resistance. This principle is known as the Maximum Power Transfer Theorem.
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About Maximum Power Output
Maximum power output describes the condition in which a source with internal resistance delivers the greatest power to an external load. The topic uses P = I²R and related circuit equations to show that maximum power occurs when load resistance equals internal resistance. This differs from maximum efficiency, which occurs under a separate condition.
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