Buenos días, hoy vamos a terminar el tema de Electricity con el tema de la Energía Eléctrica y la Potencia:
The electric power in watts represents the rate at which energy is converted from electrical energy to some other form of energy, e.g., mechanical energy, heat, light, etc. The simple formula for the power (in a resistor) in a direct current (DC) circuit is given by the product of the voltage between its terminals and the electric current that passes through it.
P = V x I
In the International System P is measured in Watts, V in volts and I in Amps.
The watt (symbol: W) is a derived unit of power in the International System of Units (SI). It measures rate of energy conversion. One watt is equivalent to 1 joule (J) of energy per second. 1W=1V×1A
It cost money to produce energy and we have to pay for it.
We have seen that: Power P = E ⁄ t so Energy is: E = P x t
( where P is in watts, Energy 'E' is in joules, and time 't' is in seconds ).
The joule is a very small unit of energy to use when dealing with domestic electricity. A unit of energy called the kilowatt per hour (kW h) is used instead: 1kwh = 1000 W .h
The kwh is the energy unit used in the home to measure the use of energy. The more energy you use, the more money you have to pay to your local electrical company.
The Cost of the energy in euros will be:
Cost = price . E
See next video:
Os dejo la actividad que hay que hacer hoy en word y entregarla con vuestro nombre en el archivo antes del próximo martes día 21 de abril:
Os dejo un vídeo de ayuda para resolverla:
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