In a series circuit, there is only one path for current. Think of it like a closed loop of water pipes powered by a pump. If you squeeze or narrow the pipe at any point, you resist the flow. Because the water has nowhere else to go, restricting one section slows down the water everywhere in the loop equally.
Pressure / Voltage (V)
12 V
Total Resistance (R_T)
60 Ω
Flow / Current (I)
0.20 A
Adjust Pipe Width / Resistance:
Slide to change the resistance. Notice how making one section harder to pass through slows down the entire system!