Resistance
The opposition to the flow of electric current, measured in ohms (Ω). It's the property that limits current in a circuit.
concept
Resistance
Resistance (symbol: R) is the opposition to the flow of electric Current.
Definition
Resistance is measured in ohms (Ω) and determines how much Current flows for a given Voltage. It’s analogous to the narrowness of a pipe restricting water flow.
Key Points
- Higher Resistance = less Current for same Voltage
- Common values: 220Ω (LED), 1kΩ (pull-up), 10kΩ (sensor)