Voltage = Current x Resistance
Note: Some components have a more complex relationship with current, so this formula does not apply to all circuits.
Resistors in series:
Rtotal = R1 + R2 + R3 …
The resistors in these circuits are in series: one after another. To find the total resistance, we add the values together.
1. Which circuit draws more current?
2. What is the voltage drop across the 10k resistor?
3. Which circuit has a larger voltage drop across the 220Ω resistors?
4. Why are the voltage drops across the 220Ω resistors different in each circuit?