alleryTwo cells joined can be replaced by one cell of equivalent:
ALength and area
BEmf and resistance
CCharge and voltage
DCurrent and power
Answer & Solution
Correct answer: B. Emf and resistance
1. The pair behaves like a single source from outside.
2. Both its driving force and its internal loss combine.
3. So it is replaced by one cell of equivalent emf and resistance.
4. The answer is emf and resistance.
_Source: syllabus Physics, Ch 3 'Current Electricity'_
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