Answer
$R = 50~\Omega$
Work Step by Step
When $\Delta V = 100~V$, we can see that $I = 2~A$
We can use Ohm's law to find $R$:
$R = \frac{\Delta V}{I}$
$R = \frac{100~V}{2~A}$
$R = 50~\Omega$
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