Introduction

electric resistor is an electronic component which provide electrical resistance in different electrical circuits. The resistors are used to reduce the flow of electric current in electronic circuits and also used to provide various signals to many electronic devices. But in electrical systems resistors are used in motor controls to produce huge amount of resistance in the way of current and also used in power distribution and for loads on generators for testation. Fixed resistors have low resistances commonly but variable resistors have huge amount of its resistance values. Resistors are used commonly in both electrical and electronics devices. Anis anwhich provide electrical resistance in different. The resistors are used to reduce the flow ofinand also used to provide various signals to many. But in electrical systems resistors are used in motor controls to produce huge amount ofin the way of current and also used in power distribution and for loads on generators for testation.have low resistances commonly buthave huge amount of its resistance values.are used commonly in both electrical and electronics devices.

Function

magnitude. The normal values of resistances fail in electrical systems due to their low ratings. The electrical function of a resistor is based on its rating. The electrical resistors are manufactured over a wide range of its. The normal values of resistances fail in electrical systems due to their low ratings.

Types

The following are the different types of resistors:

Fixed Resistor

The following are the main types of fixed resistors:

Carbon Pile

Carbon Film

Printed Carbon Resistor

Thick and Thin Film Resistor

Metal Film

Metal Oxide Film

Wire Wound

2. Variable Resistors

The following are the main types of variable resistors:

Adjustable Resistors

Potentio-meters

Formula



In electrical systems, the power consumed by a resistor can be calculated by this formula.The power consumed by a resistor is converted into heat. Here V is the voltage across resistor and I is the current consumed by a resistor.

Reaction of Resistor





power supplies, Power amplifiers etc. The average power that the resistor wastes is higher than its rating. This is due to their reversible change due to its coefficient temperature, when it warms. The wastage of huge amount of power may raise the temperature of the resistor and thus resistors burn the whole circuit board. Resistors are used to waste power inetc. The average power that the resistor wastes is higher than its rating. This is due to their reversible change due to its, when it warms. The wastage of huge amount of power may raise the temperature of the resistor and thus resistors burn the whole circuit board.

























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