Resistance Unit Instant

The ohm is defined by , which is usually written as: V = I × R V = Voltage (Volts) I = Current (Amperes) R = Resistance (Ohms)

Think of electricity flowing through a wire like water flowing through a pipe. Resistance is essentially the "friction" or the narrowness of the pipe that slows the water down. In a circuit, resistance limits the flow of electrons. The Math: Ohm’s Law resistance unit

Resistance converts electrical energy into heat. This is how your toaster, electric stove, and space heater work. The ohm is defined by , which is

One ohm of resistance exists when a crystal-clear one volt of pressure pushes one ampere of current through a conductor. Why Does Resistance Matter? The Math: Ohm’s Law Resistance converts electrical energy

Without resistance, components like LEDs would receive too much current and burn out instantly.

Because resistance can vary wildly, you’ll often see these prefixes: 1,000 ohms Megohm (MΩ): 1,000,000 ohms