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BLOCK 2 POWER - Contenido educativo

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Subido el 7 de febrero de 2023 por Beatriz T.

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ELECTRICITY AND ELECTRONICS

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Electrical energy and power. The power sources supply electrical power to the circuits. 00:00:03
The load devices consume this power and convert it to other types of energy. 00:00:09
In the international system, energy is measured in joules of J. Electrical power measures the 00:00:14
energy that is consumed by a load device or delivered by a power source over a certain 00:00:20
period. In the international system, it is measured in watts, W. 00:00:24
Power is calculated as the result of multiplying the voltage of each component by the current that flows through it. 00:00:29
The unit of energy often used is the kilowatt-hour. 00:00:37
The Joule effect. 00:00:41
In fact, all of the elements in a circuit, not just the load devices, consume a small amount of unwanted electrical energy. 00:00:49
This is a phenomenon known as the Joule effect, and it is due to the resistance of these components. 00:00:57
In our calculations in this unit, we will consider the resistance of conductors 00:01:02
and power sources to be negligible. In this exercise you have to calculate the 00:01:06
current that flows through a 1 watt motor powered by a 5 volt cell. The data is the power 00:01:13
and the voltage and you do not know the intensity. To calculate it, go through the formula that is 00:01:21
the word for power is the voltage by the intensity and clarify the equation 00:01:27
clarify the I the intensity as you have ordered that you don't have any problems 00:01:33
0.2 is the result remember not given the results in the form of fractions in this 00:01:38
exercise we have to calculate the energy that consumes is consumed by a heater 00:01:48
with a power of two kilowatts that runs for three hours first of all the data 00:01:52
we have the power that is in kilowatts so we put it in watts that is just to 00:01:58
multiply by 1000 and the time is given to us in three hours we have to put it 00:02:04
in a unit of the international system that hours remember one hour has three 00:02:11
three thousand and six hundred seconds so you have in total three hours ten thousand and eight 00:02:22
hundred seconds and the thing with that we don't know is the energy then we have the formula that 00:02:29
says that the energy is the power by the time so as we have the units of international system to 00:02:37
because they are calculate we have to calculate it in joules that is a unit of 00:02:47
the energy in the international system we have to use watts and seconds just 00:02:51
making this operation of course you use the calculator you can solve it to 00:02:57
calculate it in in kilowatts per hour it's easier because you have industry in 00:03:04
the instructions they give you the power in kilowatts and the time in our 00:03:12
So you just only have to multiply it and you have the result. 00:03:16
Autor/es:
BEATRIZ TORREJÓN
Subido por:
Beatriz T.
Licencia:
Reconocimiento - No comercial
Visualizaciones:
80
Fecha:
7 de febrero de 2023 - 19:20
Visibilidad:
Público
Centro:
IES CERVANTES
Duración:
03′ 28″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
43.50 MBytes

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