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Question:

For the circuit shown, with R1=1.0Ω, R2=2.0Ω, E1=2 V and E2=E3=4 V, the potential difference between the points 'a' and 'b' is approximately (in V).

3.3

2.7

2.3

3.7

Solution:

Correct option is B.
3.3
Eeq=E1/2R1 + E2/R2 + E3/2R1
1/2R1 + 1/R2 + 1/2R1 = 2/2 + 4/2 + 4/2
1/2 + 1/2 + 1/2 = 5/3
2 = 10/3 = 3.3.