Resistor

 Resistor

A resistor is a passive electronic component that allows us to control the flow of current in a circuit. It does this by creating opposition to the current, similar to how friction opposes the movement of an object.

Example:
Imagine you have an LED bulb that needs 3 volts to operate properly, but you have a 9-volt battery. Connecting the LED directly to the battery would damage it due to the excessive voltage. This is where a resistor comes in.
By adding a resistor in series with the LED, we can limit the current flowing through it, preventing damage and allowing the LED to illuminate safely. The appropriate resistor value depends on the specific LED and battery combination.

Units:
The unit of resistance for resistors is the ohm (Ω).





There are two types of registers.
(1) Fixed Resistor
(2) Variable Resistor

(1) Fixed Resistor - The value of a component is fixed by the manufacturer itself. For example, if the value of a resistor is 10V, then we cannot change this value.

(2) Variable Resistor - Variable resistors, also called potentiometers, have two pre-defined values set by the manufacturer: a minimum value and a maximum value. They come with a range selector that allows you to adjust their resistance to any value within this range.


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