The 3 ohm and 15 ohm conductors are connected in parallel and included in the 45 volt circuit

The 3 ohm and 15 ohm conductors are connected in parallel and included in the 45 volt circuit. Determine the amperage in each conductor and in the general circuit.

According to Ohm’s law, the current in a circuit is directly proportional to the voltage and inversely proportional to the resistance.
I = U / R, where I is the current in the circuit, U is the voltage, R is the resistance

Since the conductors are connected in parallel, a voltage of 45V is applied to each of the resistances.
Then in resistance 3 [Ohm] the current strength is equal to:
I = 45 [V] / 3 [Ohm] = 15 [A]

And in a resistance of 15 [Ohm], the current is equal to:
I = 45 [V] / 15 [Ohm] = 3 [A]

Answer. 15A and 3A