Mathematics · Current Electricity
A battery supplies 0.9 A current through a 2 Ω resistor and 0.3 A current through a 7 Ω resistor when connected one by one. The internal resistance of the battery is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 10.5 Ω✓
- 21.0 Ω
- 31.2 Ω
- 42 Ω
Correct answer
0.5 Ω
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