How is resistance measured in an electrical circuit?

Resistance in an electrical circuit is measured in ohms. The ohm is the standard unit of resistance in the International System of Units (SI) and is represented by the symbol "Ω." When the resistance is high, it restricts the flow of electric current, while lower resistance allows more current to pass through the circuit.

Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R) (V = I × R), further underscores the significance of this measurement. By knowing the resistance, along with the voltage and current in a circuit, one can analyze and design electrical systems effectively. This makes understanding resistance crucial for anyone working with electrical systems.