The potential difference between `A` and `B` is
.

Options

A. 9 V
B. 15 V
C. 10 V
D. 20 V

Answer

A

Explanation

`E = ((30)/(6) +(6)/(5)+(4)/(2))/((1)/(6)+(1)/(3)+(1)/(2)) = (5 + 2+2)/(1) = 9 V`
`E = 9 V`

`V_A - V_B = E = 9 V`.