Calculate the e.m.f of the cell in the above circuit if i...
Calculate the e.m.f of the cell in the above circuit if its internal resistance is negligible
A.
12 V
B.
8 V
C.
2 V
D.
36 V
Correct answer is B
1/R = 1/R1 + 1/R2 = 1/3 + 1/6
= 3/6
∴ R = 6/3 = 2
E = I(R + r) = 4(2 + 0) = 8v