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Three identical 2 V, 3 ohm cells are in parallel. Equivalent internal resistance?
A9 ohm
B3 ohm
C1 ohm
D6 ohm
Answer & Solution
Correct answer: C. 1 ohm
Identical cells in parallel combine like equal resistors, so r_eq = 3/3 = 1 ohm and the emf stays 2 V.
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