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Two cells in series have internal resistances 0.2 ohm and 0.3 ohm. What is the equivalent internal resistance?
A0.5 ohm
B0.12 ohm
C0.1 ohm
D0.06 ohm
Answer & Solution
Correct answer: A. 0.5 ohm
For cells connected in series, internal resistances add: 0.2 + 0.3 = 0.5 ohm.
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