Physics · Current Electricity
Two identical cells, each of e.m.f. E and internal resistance r, are connected in parallel across an external resistor R. The power delivered to the resistor is maximum when:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1R = r/4
- 2R = 2r
- 3R = r
- 4R = r/2✓
Correct answer
R = r/2
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