07-04-2026, 08:49 PM
Ni Joe,
In a series circuit, current is constant. In your example, the current is 0.375A anywhere in the series circuit. If P = EI (Wattage = Voltage X Current), then, like you said, the total dissipated power through the 27 Ohms is 3.7W, However, since you have a 22 Ohm and a 3.5 Ohm resistor, the current through each is the same, but the 22 Ohm resistor will dissipate more power than the 3.5 Ohm resistor. There is absolutely no problem with the 3.5 Ohm resistor. The 22 Ohm one will dissipate more because the voltage drop across that resistor is much more than the voltage drop across the 3.5 Ohm resistor. However, you are safe. I would feel a little better if the 22 Ohm resistor was a 10 watt job but you are still OK here.
In a series circuit, current is constant. In your example, the current is 0.375A anywhere in the series circuit. If P = EI (Wattage = Voltage X Current), then, like you said, the total dissipated power through the 27 Ohms is 3.7W, However, since you have a 22 Ohm and a 3.5 Ohm resistor, the current through each is the same, but the 22 Ohm resistor will dissipate more power than the 3.5 Ohm resistor. There is absolutely no problem with the 3.5 Ohm resistor. The 22 Ohm one will dissipate more because the voltage drop across that resistor is much more than the voltage drop across the 3.5 Ohm resistor. However, you are safe. I would feel a little better if the 22 Ohm resistor was a 10 watt job but you are still OK here.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55




