Questions
Two identical cells send the same current in resistance, whether connected in series or in parallel. The internal resistance of the cell should be
a
1 Ω
b
2 Ω
c
12 Ω
d
2.5 Ω
detailed solution
Correct option is B
In series, i1= 2E2+2rIn parallel, i2= E2+r2 = 2E4+rSince i1= i2⇒ 2E4+r = 2E2+2r ⇒ r=2ΩTalk to our academic expert!
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