In the given circuit, the potential difference between the points A and B is

Options

A. 10 V
B. 15 V
C. 20 V
D. 5V

Answer

C

Explanation

This is a balanced wheatstone's network.
`therefore` Current through BD=0, Current through `4 Omega=I_(1)`
Current through `10 Omega= (7-I_(1))`
`therefore 4 I_(1)=10(7-I_(1)) therefore 14 I_(1)=70`
`therefore I_(1)=5A therefore` PD between A and B `=4xx5=20 V`