A 40- $\Omega$ Resistor Is Connected with a 12- $\Omega$ Resistor and Both of These Are Connected Across an Ideal

Multiple Choice

A 4.0- $\Omega$ resistor is connected with a 12- $\Omega$ resistor and both of these are connected across an ideal dc power supply with voltage $V$ as shown in the figure. If the total current in this circuit is $I = 2.0 \mathrm {~A}$ , what is the current through the $4.0 - \Omega$ resistor?

A) $2.5 \mathrm {~A}$
B) $3.0 \mathrm {~A}$
C) $2.0 \mathrm {~A}$
D) $1.5 \mathrm {~A}$
E) $0.5 \mathrm {~A}$