Neat Watts Equation Physics

Begin alignPower frac Work Timeend align Power may be measured in a unit called the horsepower.

Watts equation physics. The SI unit of voltage is a volt the unit of amperage is an ampere usually shortened to amp and the unit of power is a watt. The convention of using watts amps and volts. In terms of electromagnetism it is the current flow of one ampere with a voltage of 1 volt.

Equation Units wattssquare cm or wattscm2 watts from power and cm2 from beam area Determined By Sound source initially Changed by Sonographer Yes Intensity decreases as sound propagates through the body. Another common but popular unit of power that motors are rated in. It takes a particular kettle 1 minute and 46 seconds to boil a quantity of water.

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. The relation between watt and volt is direct. Whenever one Volt is used to move an Ampere through a circuit the work done is equal to one Watt of power.

A system of water pipes is often used as an analogy to help people understand how these units of electricity work together. Physicists use power in mechanics and electricity. Power is a scalar quantity.

Resistance R voltage V and amperage IElectric current can also be a source of power P so that it can release or transport some energy. Power is an amount of energy supplied in a certain time. In physics power is the amount of energy transferred or converted per unit time.

Power can be calculated from work and time using the equation. Important powers that are measured in microwatts are typically stated in medical instrumentation systems such as the EEG and the ECG in a wide variety of scientific and engineering instruments and also in reference to radio and radar receivers. Calculate watts W from joules per second Js The equation for watts is given on the right.