Consider the circuit shown in (Figure 1).
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EXECUTE: Apply Kirchhoff's junction rule to point a: $\sum I = 0$ so $I + 4.00 \, A - 6.00 \, A = 0$
$I = 2.00 \, A$ (in the direction shown in the diagram).
Find the resistance $R$.
Express your answer in ohms.
Find the unknown emf $\mathcal{E}$.
Express your answer in volts.
28.0 V
R
$\mathcal{E}$
4.00 A
6.00 $\Omega$
6.00 A
3.00 $\Omega$