WHAT IS RESISTOR??
A Resister Is a Passive Two Terminal Electrical Component That Implements Electrical Resistance as Circuit Elements. The Ratio of The Voltage Applied Across A Resister’s Terminals To The Intensity Of Current Through The Circuit Is Called Resistance. This Relation Is Represented by Ohm’s Law:
V = I R
UNIT & SYMBOL: –
The Ohm (Symbol: Ω) Is the Unit of Electrical Resistance, Named After Georg Simon Ohm.
An Ohm Is Equivalent to A Volt Per Ampere
Other Derived Units Are Mili Ohm (1mΩ=10-3 Ω), Kilo Ohm (1kΩ=103Ω), And Mega Ohm (1mΩ=106Ω).
TYPES OF RESISTOR: –
- Fixed Resistor
- Variable Resistor
- FIXED RESISTOR
- Carbon Composite Resistor
- Film Resistor
- Wire Wound Resistor
- Resistance Wire
VARIABLE RESISTOR: –
- Photo ResistorCONNECTION OF RESISTOR:-Series Connection:-In Series Connections , The Current Remains Constant
(i.e. I-I1-I2 -………-IN)
In Series Connection, Voltage Adds Up.
(i.e. V-V1+V2 +…….+VN)
In Parallel Connection, The Voltage Remains Constant.
In Parallel Connection, Current Adds Up.
RESISTOR COLOUR CODE:-
An electronic color code is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others. A separate code, the 25-pair color code, is used to identify wires in some telecom
RESISTOR POWER RATING: –
The Power Rating of Resistor Can Be Calculated Using the Formula: –
The Larger The [Power Rating, The Greater the Physical Size of The Resistor.
When Used in Ac Circuits the Ac Impedance of a Resistor Is Equal to Its Dc Resistance.