The electrical system in any category is a world of. discoveries. The genius Nicola Tesla says so.
Electricity is the main fuel that powers the. world and everything is generated like a domino: one piece needs the work of the other.
Everything is energy, the question is: how to use it? Here in this article, let's find out together how the resistor association.
Index
The resistor is a device that aims. transform electrical energy into thermal energy. This is through the effect. joule in order and let this energy conditioned only in one circuit.
The resistor has a dynamic opposite to the passing of. electric current over it which is calculated in ohms.
The joule effect arises as the electric current. runs through a resistor and this converts electrical energy into thermal. It's the. resistor dissipates energy in the form of heat.
In this way, the total power of the system decreases. When this resistor heating occurs by this passage of electric current, the joule effect occurs. The joule effect is measured in volts.
Ohm's law says electrical resistance is. determined between the electric potential and the electric current. In this law, the. electrical potential is the result of resistance by electrical current.
Through Ohm's law it is possible to calculate several. elements of physics such as voltage, current, electrical resistance, among others.
This law states that the electric current represented. by l, is directly proportional to the voltage difference nos. conductor terminals, symbolized by V.
But this will only be considered true when it exists. an ohmic conductor, which is what keeps its resistance value constant. when kept also at constant temperatures.
But in practice this does not happen, because the temperature. varies due to power dissipation.
Ohm's second law demonstrates that the value of. electrical resistance of a certain conductor is proportional to its length L, and inversely to its area A.
This means that the larger a resistor, the larger the resistive material that the electric current has to pass through, increasing the potential drop.
If the area covered is larger, the larger will be a. resistance suffered by loads.
The equivalent resistance is the value of the resistance that. when alone it can replace all other resistances without changing the whole. associated with the circuit.
To make calculations of the voltage at which each resistor. is being submitted, Ohm's first law is used:
U = R. i
U = electrical potential difference (ddp), measured from. volts (V)
R = resistance, measured in Ohm
i = intensity of the electric current, measured in. ampere.
On a single circuit it is possible to make a network of. distinctly interconnected resistors, called resistor association.
This association solves the problem of when. we need more resistance when one resistor is not enough. There are several types of this system. See below.
In this association the resistors are connected one after the. another to run a single electrical current.
The power difference (ddp - current unit) total when applied from point A to B, equals the sum of the ddps of each. resistor.
The equivalent called resistance for this type of. association, is the result of the sum of all the resistances they are making. part of the circuit.
It is important to know the equivalent resistance of this. circuit shape will always be greater than the value of one resistor only.
At resistor association in parallel, the. resistors are connected next to each other. This makes these resistors. undergo the same potential difference.
The entirety of the electrical current that is in. circulation through this type of circuit is equal to the sum of the electrical current that. runs through and through each of the resistors.
The equivalent resistance value of this type of. circuit will always be less than the value of any of the resistors that. make up this circuit system.
It is resistor association is the mix between. serial association and parallel association.
To find the resistance equivalent of this. association, it is necessary to note the types of associations separately and theirs. features.
To calculate this system in its entirety, it is first necessary to calculate in parallel. With this value established, consider it as a series resistor.
When a negligible lead wire is connecting them. terminals of a resistor in an electrical circuit, the d.d.p of these terminals. becomes null.
This condition demonstrates a short circuit, not traveling or being traversed by any electrical current. Causing that all electrical current in the circuit is diverted to the conductor of this zero resistance. It is as if the resistor has no connection to the circuit.
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