Answer
The potential difference between A and B is $~~50~V$
Work Step by Step
We can find the potential difference $\Delta V$ between A and B:
$Power = i~\Delta V$
$\Delta V = \frac{P}{i}$
$\Delta V = \frac{50~W}{1.0~A}$
$\Delta V = 50~V$
The potential difference between A and B is $~~50~V$
