✔ What Is Meant By The Resistance Of A Resistor

What Is Meant By The Resistance Of A Resistor

- August 24, 2019

The current is proportional to the voltage across the terminal ends. A resistor with very low resistancefor example less than 1 wcould be considered a conductor.

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The total resistance of resistors connected in parallel is the reciprocal of the sum of the reciprocals of the individual resistors.

What is meant by the resistance of a resistor. All other factors being equal in a direct current dc circuit the current through a resistor is inversely proportional to its resistance and directly proportional to the voltage across it. An ohm is the resistance that occurs when a current of one ampere passes through a resistor with a one volt drop across its terminals. Resistance is the opposition that a substance offers to the flow of electric current.

The function of a resistor is to oppose the electric current through it. This is called electrical resistance and is measured in the unit ohm. The unit that we use to specify the resistance of a resistor is the ohm denoted by the symbol w.

This is the well known ohms law. The resistance of a resistor is dependent on its material and shape. The total resistance of resistors connected in series is the sum of their individual resistance values.

. For example if you know that 4 watts max will be passing through the resistor select a 12 to 99 billion watt rated resistor. The resistance is measured in ohms.

When selecting a proper resistor you must select one that can handle more watts than you will be putting through it. Surface mount resistors generally have a ceramic substrate body onto which is deposited a thick layer of metal oxide resistance. Resistance of a resistor.

When an electric current of one ampere passes through a component across which a potential difference voltage of one volt exists then the resistance of that component is one ohm. It is represented by the uppercase letter r. Although a resistor with a 10k resistance will have the same resistance whatever it is made from characteristics like the temperature stability noise long term stability spurious inductance and the like can be different for different types and this can affect the performance in some circuits.

If the resistance is in the tens of millions of ohms the resistor will function like an insulator. The watt rating of a resistor is the max watts that it can handle. The resistance can be calculated with ohms law when the current is known and the voltage drop is measured.

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.