Simplifying the concepts of electricity
Simplifying the concepts of electricity
Many say that the electrical specialization is one of the most difficult disciplines to study among the engineering sciences. This may be true for a very important reason, which is that we do not see electricity or that it needs a lot of imagination to imagine it
In this article, we will review the most important methods used to facilitate some concepts of electricity:
The concept of potential difference (effort): The potential difference in our ordinary life is similar to the water pressure, and it is also idiomatically called the potential difference by (pressure), so we sometimes say: Beware of high pressure electricity. As we can say low pressure we mean low effort, and in normal life water has low pressure or high pressure.
The electric current is similar to the movement of water in pipes, and just as the water moves from the high tank to the low tank as a result of the height difference, the electric current also moves from high voltage to low voltage in batteries, for example.
It is also possible to liken the effective electrical power, which is measured in the unit (watt), which expresses the power of the devices to the potatoes in the (bag), while the vacuum inside the bag represents the ineffective capacity. Some use a cup of coffee (cappuccino).
The capacitor can be imagined as if it were (a spring). When the capacitor is charged electrically, it retains the charges in it, and it can be discharged momentarily when its two ends touch each other. This is like a spring when it is compressed to retain a potential energy, but once the pressure is removed from it, it releases this energy.
It is possible to imagine the electrical resistance that resists the passage of current, as if there is a narrowing or blockage in a tube that impedes the movement of water, and it is worth noting that batteries are similar to water pumps, where the battery moves the charges in the wires, while the pumps move the water in the tubes.
There is Ohm’s law , which states that in any electric wire to which a potential difference is applied, the current flowing is directly proportional to this voltage. This current encounters resistance and is always constant. Here we see the three men in the tunnel, as if one of them (effort) pushes the other (current) while the third tries to prevent it (resistance).
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