✔ How To Find The Resistance Of A Carbon Resistor

How To Find The Resistance Of A Carbon Resistor

- May 02, 2018

Ohms law equation can be used to calculate resistance value of a conductor. The components which provide a specific value of resistance in the electrical circuit is called a resistor.

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The resistance can be calculated with ohms law when the current is known and the voltage drop is measured.

How to find the resistance of a carbon resistor. However the properties are less good. The function of a resistor is to oppose the electric current through it. The cylindrical rod with large cross sectional area provides large space for the free electrons to move freely.

Each resistor has a specific resistance value. What is the resistor. The wirewound resistor for example has a much smaller volume of the wire to conduct.

This particular carbon resistor. There are many types of resistors both fixed and variable. They are made in different physical sizes with power dissipation limits commonly from 1 watt down to 18 watt.

Carbon resistors can be made with a higher resistance than wirewound resistors and are considerably cheaper. A carbon pile resistor is made of a stack of carbon disks compressed between two metal contact plates. This is called electrical resistance and is measured in the unit ohm.

Thus it is necessary to calculate the resistance of a resistor. The resistance of the carbon composition resistor is inversely proportional to the cross sectional area of the cylindrical rod. Resistor gets damaged or burnt due to overheat if it used for high electric power greater than its ratings.

Surface mount resistors generally have a ceramic substrate body onto which is deposited a thick layer of metal oxide resistance. Resistance of a resistor. The resistance of a resistor is dependent on its material and shape.

So the thermal mass of the carbon composition resistor is much higher resulting in a higher energy capability. Heres an example of calculating the resistance of a carbon resistor that measures 0005 meters 5 millimeters long with a diameter of 0001 meters 1 millimeter. These components of substance are used to reduce the flowing current control the circuit.

The resistive value of the resistor is controlled by increasing the desired thickness length or type of deposited film being used and highly accurate low tolerance resistors. Hence the possibility of collision of free electrons with the atoms is low. Resistor color code is simple and easy way to calculate resistance value of a resistor.

The most common type for electronics use is the carbon resistor. The resistor is a passive component as it can not operate without energy supply. The resistance value and tolerance can be determined from the standard resistor color code.

Before using any resistor in the electrical circuit you need to find out the resistance value of the resistor. Adjusting the clamping pressure changes the resistance between the plates. In a previous article about basics information about resistors we have seen there are four color bands on each resistor.

These resistors are used when an adjustable load is required for example in testing automotive batteries or radio transmitters.