Physics · Current Electricity
Two cells of emf 2E and E with internal resistances r1 and r2 respectively are connected in series to an external resistor R. The value of R at which the potential difference across the terminals of the first cell becomes zero is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1r1 - r2
- 2r12 + r2
- 3r12 - r2✓
- 4r1 + r2
Correct answer
r12 - r2
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