What is a resistor in an electrical circuit?

A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor. read more

The resistor is a passive device and doesn’t do anything actively to your circuit. It’s actually a pretty boring device. If you add some voltage to it, nothing really happens. read more

A resistor is a little package of resistance: wire it into a circuit and you reduce the current by a precise amount. From the outside, all resistors look more or less the same. As you can see in the top photo on this page, a resistor is a short, worm-like component with colored stripes on the side. read more