Series circuit with two Light Emitting Diodes (LEDs) connected to a 4V power source. Each LED has a 2V drop, and the current through the circuit is 20mA (since current remains the same in a series circuit).
To calculate the total power (in watts):
P = 4V * 0.02A = 0.08W
So, the total power consumed by the circuit is **0.08 watts** or **80 milliwatts**.
