Question

Figure shows a part of a closed circuit. If the current flowing through it is $2A$. What will be the potential difference between points $B$ to $A$?

• A. $+2V$
• B. $-1V$
• C. $+1V$
• D. $-2V$

Answer 1

The correct option is D $-2V$

$V_{AB}=2\times \frac{1}{4}+1+2\times \frac{1}{4}{V}_A-V_B=\frac{1}{2}+1+\frac{1}{2}=2V_B-V_A=-2V$