Ohm's and Watt's Laws | SpazzTech
Watts would be the power (volts x amps) the water could provide (think back to the The accepted standard unit used for measuring how fast an electric current . The relationship between power (measured in Watts) and electrical current ( measured in Amperes or "Amps") is one of my favorites because electrical power . Ohm's Law defines one of most fundamental relationships in electronics. That is the relationship between Voltage, Current, and Resistance. Watt's Law defines.
Once we add a bulb to the circuit, resistance is created. There is now a local "blockage" or narrowing of the pipe, per our water pipe analogy where the current experiences some resistance. This greatly reduces the current flowing in the circuit, so the energy in the battery is released more slowly. As the battery forces the current through the bulb, the battery's energy is released in the bulb in the form of light and heat.
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In other words, the current carries stored energy from the battery to the bulb, where it is turned into light and heat energy. The image above shows a light bulb as the main cause of electrical resistance.
A watt is the base unit of power in electrical systems. It can also be used in mechanical systems. It measures how much energy is released per second in a system.
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In our battery diagram, the size of both the voltage and the current in the bulb determine how much energy is released. In the diagram above, the light bulb would get brighter as the power, measured in watts, increases. We can calculate the power released in the bulb, and of the electrical system as a whole, by multiplying the voltage by the current.
So, to calculate watts, the following formula is used. How to Calculate with Watts, Amps, Volts, and Ohms If you want to do an electrical calculation involving voltage, current, resistance, or power, reference the formulae circle below.
For example, we can calculate the power in watts by referencing the yellow area in the circle. The unit that is used for measuring the parameter of current is the ampere. Ampere is often shortened to amp. The symbol used to represent the amp is the letter "A".
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Both upper and lower case is used depending on the situation. The symbol used to represent the parameter of current is the letter "I". If an electric circuit were a garden hose, current would be similar to the flow rate of the water in the hose.
The unit A is equal to the number of coulombs flowing through the circuit in one second. The unit that is used for measuring the parameter of resistance is the ohm.
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The symbol used to represent the parameter of resistance is the letter "R". If an electric circuit were a garden hose, resistance would be any valve or other restriction in the hose.
This forms the basis for the forms of Ohm's law given in the next section. The Forms of Ohm's Law: The unit that is most often used for measuring power in electronics is the watt.
The symbol used to represent the watt is the capital letter "W". At its core, power is the rate at which work is done. In fact, one watt is equal to one joule per second. From the definitions given for Volts and Amps given above, we can say that one watt is also equal to one volt multiplied by one amp because the volt is the measure of joules per coulomb and the amp is the measure of coulombs per second.