The resistors are connected both in parallel and series. To calculate the total resistance, we have:

For the parallel connection: \(\frac{1}{R} = \frac{1}{1} + \frac{1}{1}\)

\(\frac{1}{R} = 2 \implies R = 0.5\Omega\)

For the series connection: \(R_{total} = (1 + 0.5)\Omega = 1.5\Omega\)

Recall, \(V=IR\)

\(3 = 1.5I  \implies I = \frac{3}{1.5} =2A\)