Work done w 300 j time taken t 10 s. Electrical power is calculated by multiplying voltage in volts by current in amps.
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Another way to consider the same components is as follows.
Average power output formula physics. The power formula is used to compute the power resistance voltage or current in any electrical circuit. Great now you know the force applied and the average speed. For the generator in an rlc circuit tanϕ xl xc r and.
Power force distance time displaystyle text power text force frac text distance text time. The standard metric unit of power is the watt. This can be shown in.
Power work time or p w t. Power is work or energy divided by time so power has the units of joules second which is called the watt a familiar term for just about anybody who uses anything electrical. As is implied by the equation for power a unit of power is equivalent to a unit of work divided by a unit of time.
It is the work time ratio. The standard metric unit of power is the watt. The limiting value of average power such that δt approaches to zero is known as instantaneous.
If cosϕ 0 it absorbs power. Cosϕ r r2 xl xc 2 r z. Plugging in the numbers gives you the average velocity.
In terms of rms values the average power of an ac generator is written as. To find the average power. One horsepower 745 7 watts so.
Power is the rate at which work is done. If cosϕ 0 the generator produces power. An electric machine makes use of 300 j of energy to do work in 10s.
Hence the average power of the generator is. If a transformer is 100 efficient then the input power will equal the output power. An average quantity in physics is often written with a bar over it as in the following equation for average power.
Power is the rate at which work is done. Therefore the car developed an average of 78 0 horsepower not 100 horsepower. The ratio of total work to the total time is called average power mathematically it is expressed as if δw is the work done in time δt then average power will be.
Mathematically it is computed using the following equation. You can use the equation. Here we can calculate power work time.
How much power does it use. The original formula for power focuses on work as a force times distance and divides by the time it takes to do that work. You still need to convert to horsepower.
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