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

Options

A. 0
B. 5 volt
C. 10 volt.
D. 15 volt.

Answer

C

Explanation

Here p-n junction is forward biased. If p-n junction is ideal, its resistance is zero. The effective resistance across A and B
`=(10xx10)/(10+10)=5KOmega`
Current in the circuit
`I=(30)/((10+5)xx10^(3))=(2)/(10^(3))`
`therefore" Current in each arm"=(I)/(2)=(1)/(10^(3))A.`
Pot. diff. across A and B
`=(1)/(10^(3))xx10xx10^(3)=10V`