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How does wattage work?

Updated: 12/6/2022
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Q: How does wattage work?
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What is the equation for wattage?

Wattage = voltage times amperage. That's for DC. For AC there is a power factor PF = cos phi you have do multiply with.AnswerThe above answer suggests that power ('wattage') is an electrical unit, which it is not. In fact, power is defined as the rate of doing work, so the basic equation is work divided by time.


Will a higher wattage hps bulb work in a ballast that came with a lower wattage bulb?

A higher wattage HPS bulb may work with a ballast that is rated for a lower wattage bulb , but may appear to be dim and will not produce the rated light output. It is best to match ballast and bulb accordingly.


Will 200 volt appliance work in with 240 volt supply?

It will work but not as efficient as the manufacturer designed it to. If motors are involved in the appliance they will run hotter as they will draw a higher amperage due to the lower voltage. Appliances with a wattage rating for heating elements will not reach their nameplate wattage rating.


How do you find the actual wattage of an electrial component?

Wattage= current*voltage*power factor. Wattage=VI Cos(@)


Can bulb wattage safely exceed that which is recommended on the fixture?

No, it is not safe to exceed the recommended wattage on a fixture. The wattage rating indicates the maximum amount of power that the fixture is designed to handle safely. Exceeding this wattage can cause overheating, fire hazards, and damage to the fixture. Always follow the manufacturer's recommendations for bulb wattage.


Do the same wattage candelabra and incandescent bulbs draw the same power?

Yes, wattage is wattage, is wattage, is wattage. "Power" is calculated in wattage. It equals the voltage times the current in amps. In a light bulb, the resistive filament will cause a certain amount if current to flow making the filament hot and producing light.


What is the wattage of tea boiler?

The wattage can vary depending on manufacturer, capacity, model, etc. The wattage will be stated on a label fastened to the boiler.


Will your old Acer charger work on your new Acer Acer aspire?

If they are the same wattage and voltage, and have the same connector, yes.


How many amps do you need for 2 120 volt lights?

Need to know the wattage to work out the amperage


A ford explorer preamp has how many watts?

NO preamp has wattage or a wattage rating. The only wattage involved in a sound system comes from the POWER amp


What would be the maximum rating of the incandescent bulb for a dimmer switch?

Find the wattage rating on the dimmer controller. This is the maximum allowable wattage that the lamp in the fixture should be. Lamp wattage ratings under the rated dimmer wattage is fine but do not install a larger wattage lamp that is over the dimmer control's rating.


How you determine wattage?

wattage is nothing but power product of current and voltage p=v*i