Resistance is the measure of how much an object resists the flow of electric current. Measured in ohms, it’s fundamental in electrical engineering, helping us design circuits and manage power distribution. The higher the resistance, the harder it is for electricity to flow, impacting everything from light bulbs to computer chips.
- Ohm (Ω): This is the standard SI unit of electrical resistance, representing the opposition a material offers to the flow of electric current. One ohm is defined as the resistance between two points of a conductor when a constant potential difference of 1 volt, applied across the points, produces a current of 1 ampere.
- Kiloohm (kΩ): Equivalent to 1,000 ohms, this unit is often used in circuits with high resistance requirements, common in electronics and telecommunications.
- Megaohm (MΩ): Equal to 1,000,000 ohms, the megaohm is typically used in fields like high-voltage engineering and insulation testing, where very high resistance values are needed to prevent current leakage.
