Justin R asked:
in english like the way you would explain it to an 8th grader
in english like the way you would explain it to an 8th grader
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A watt is a Joule per second. An ampere is a Coulomb per second. A volt is a Joule per Coulomb. A hertz is one cycle per second. The ohm is one volt per ampere.
Watts – Unit of Power
Amps or Amperes – Unit of Current
1. This are the ones that travel in electrical wires
Volts – Unit of Potential difference or Voltage
1. This are ones you see in placards in electrical companies. 1000 Volts. Do not touch!To much of this will kill you.
Hertz – Unit of Frequency
1. Just tell this is how many times it occur in one second. Say Barney shakes his hips 5 hertz. So he shakes his hips 5 times in one second.
Ohms – Unit of Resistance
1. This are the ones that resist the amount of current that passes thru a circuit. Just say it as the hoover dam. The hoover dam acts as a resistor. It blocks the water which represents the current. But the resistor all spills current when its high. Same as the dam which spills when the water is too high.
Watts is the rate at which electrical energy is used to do something. Watts measure how many joules of energy are used by a device each second.
You can relate watts to voltage and current by using Watts = Volts x Amps
Amps is the amount of electrical current passing through a point, imagine this as a flow of tiny particles inside a wire, the more of these passing through a point each second mean a greater current. These particles are known as electrons.
When you get electrocuted, it is actually the number of amperes flowing through you that kills as more electrons are present to damage your body.
For a deeper understanding, electrons have an electrical charge of 1.6 × 10^-19 coulombs, a current of 1 amp has 1 coulomb of charge flowing through each second so thats 6.25 x 10^18 electrons per second! This number is huge and to make our lives easier, we use amperes (amps) to measure current and coulombs to measure charge.
Volts is the electrical pressure difference between two points, a higher voltage means the electricity pushes harder to get through, you can think of this as the pressure inside a pipe to imagine this.
When you see thoese high voltage signs, they warn you that the electricity can easily jump like lightning and zap you, remember if the current extremely low (micro amps) it wont kill you but anything with large equipment would have a high current that can kill you!
Hertz is the speed at which the electricity changes the direction it moves in, this only applies to AC current – alternating current. the hertz is a measure of how many times a second the electricity switches direction.
You may think this is a useless thing but in a few years you will learn about transformers and why AC is useful.
Batteries provide DC (direct current) and it only moves in one direction.
Ohms is the resistance, is is how much a circuit or object slows down the electricity flowing through it. Insulators such as plastic or air have a fairly high resistance while conductors such as metals have a low resistance.
You can relate resistance to voltage and amperes by using
Voltage = Current x Resistance
Hope this helps ;)