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rasistors
Electronics
Product ID:
HF184151
Stock:
437 units available
Details:
🔹 What is a Resistor?
A resistor is one of the most basic and widely used electronic components.
...
🔹 What is a Resistor?
A resistor is one of the most basic and widely used electronic components.
It is a passive component that resists the flow of electric current, reducing voltage and controlling current in a circuit.
🔹 Symbol in Circuit:
Fixed resistor: zig-zag line or rectangle (depends on standard).
Variable resistor (potentiometer): arrow across the symbol.
🔹 Unit:
Resistance is measured in Ohms (Ω).
Large values: kilo-ohms (kΩ = 1000 Ω), mega-ohms (MΩ = 1,000,000 Ω).
🔹 Types of Resistors:
Fixed Resistor – fixed resistance value.
Carbon film, Metal film, Wire-wound.
Variable Resistor (Potentiometer/Trimmer) – resistance can be adjusted.
Special Resistors:
LDR (Light Dependent Resistor): resistance changes with light.
Thermistor: resistance changes with temperature.
Varistor: resistance changes with voltage.
🔹 Color Code:
Resistors have colored bands to indicate their resistance value.
Example: Red (2), Violet (7), Brown (×10) → 270 Ω.
🔹 Applications:
Limit current to protect LEDs and other components.
Divide voltage (voltage divider circuits).
Biasing transistors in amplifier circuits.
Timing circuits (with capacitors).
Pull-up and pull-down resistors in microcontrollers.
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PKR 4.00