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What formula do you use to determine the amount of energy used by an appliance?
Wiki User
∙ 12y ago
Power use of an electrical appliance is calculated by finding its rating in watts. The formula is W = I x E. Watts = Amps x Volts.
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Power is a general term. If you want to know how much you pay to power a certain appliance you need to figure out the amperage of the appliance, (usually located on the appliance itself or in the instructions). Power companies use kilowatt hours to charge you for electricity, to figure out how many kilowatt hours your appliance uses you would need to multiply the amperage your appliance uses by .115 and that would give you the kilowatts it is using. Then you would multiply that by how many hours you use said appliance and then multiply by your cost per kilowatt hour, (found on your electric bill).
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoMultiply the power (in watts) by the time the appliance is on (in seconds). The result is the energy used in joules. Alternately, you can multiply the power in kilowatts by the time in hours; the result is kilowatt-hours.
You can usually find the power on a metal sheet on the appliance that lists the specifications. It is possible that the power in watts is not specified directly; in this case, the current and the voltage will be specified. Multiply the two to get the power. (In AC, in theory you should also multiply by a power factor, but this is often close to 1, and can be ignored.)
Multiply the power (in watts) by the time the appliance is on (in seconds). The result is the energy used in joules. Alternately, you can multiply the power in kilowatts by the time in hours; the result is kilowatt-hours.
You can usually find the power on a metal sheet on the appliance that lists the specifications. It is possible that the power in watts is not specified directly; in this case, the current and the voltage will be specified. Multiply the two to get the power. (In AC, in theory you should also multiply by a power factor, but this is often close to 1, and can be ignored.)
Multiply the power (in watts) by the time the appliance is on (in seconds). The result is the energy used in joules. Alternately, you can multiply the power in kilowatts by the time in hours; the result is kilowatt-hours.
You can usually find the power on a metal sheet on the appliance that lists the specifications. It is possible that the power in watts is not specified directly; in this case, the current and the voltage will be specified. Multiply the two to get the power. (In AC, in theory you should also multiply by a power factor, but this is often close to 1, and can be ignored.)
Multiply the power (in watts) by the time the appliance is on (in seconds). The result is the energy used in joules. Alternately, you can multiply the power in kilowatts by the time in hours; the result is kilowatt-hours.
You can usually find the power on a metal sheet on the appliance that lists the specifications. It is possible that the power in watts is not specified directly; in this case, the current and the voltage will be specified. Multiply the two to get the power. (In AC, in theory you should also multiply by a power factor, but this is often close to 1, and can be ignored.)
Wiki User
∙ 13y agoYou need to know the operating voltage and the current draw of the appliance. These can both be found on a label somewhere on the appliance. The current multiplied by the voltage will tell you power consumption in Watts. Ohms law P=IE (P=Power in Watts, I=Current in amps, E=Voltage in Volts) Your household power consumption is measured in KWh (kilowatt hours) (W x h) / 1000 = KWh ex. If an appliance with a power rating of 1000W were left running non stop for 15 min its total power consumption would be (1000 x .25) / 1000 which equals 0.25 KWh
Wiki User
∙ 12y agoThe easiest way is to get a kilowatt meter.
AnswerUnfortunately, a wattmeter will only tell you the power of your appliance, not the amount of energy it consumes. You could use the wattmeter, if the appliance worked continuously at it rated power but few appliances, other than lamps, do.So, the simplest method is to ensure that the appliance is the only load switched on, then take a reading of your home's energy meter, and repeat that reading in an hour. The difference in the two readings will tell you how much energy, in kilowatt hours, your appliance has used over that period of time. This method will only work satisfactorily if it has a relatively high power rating; for appliances with low power ratings, you will have to allow a far longer period between readings.
Wiki User
∙ 12y agoMultiply the power (in watts) by the time the appliance is on (in seconds). The result is the energy used in joules. Alternately, you can multiply the power in kilowatts by the time in hours; the result is kilowatt-hours.
You can usually find the power on a metal sheet on the appliance that lists the specifications. It is possible that the power in watts is not specified directly; in this case, the current and the voltage will be specified. Multiply the two to get the power. (In AC, in theory you should also multiply by a power factor, but this is often close to 1, and can be ignored.)
Wiki User
∙ 12y agoThe total amount of energy used by an appliance is equal to the power consumption multiplied by the time the appliance is in use. E = P x T ENERGY=POWERxTIME DDASIA
Wiki User
∙ 14y agoPOWER= VOLTAGE x CURRENT
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What affects the amount of electric energy an appliance uses?
Its resistance.
What determines whether a 100-W light bulb costs more to use than a 1200-W hair dryer costs to use?
The electric power used by an appliance is the rate at which the appliance converts electrical energy to other forms of energy. The electrical energy used by an appliance depends on the power of the appliance and the length of the time it is used.
What is the formula of energy transmission?
Energy can take different forms, and it can be transmitted in different ways. Therefore, there is not a single formula, but several, depending on the type of energy transmission. In general, the total amount of energy that arrives at the destination will be less than or equal to the amount of energy that leaves the origin.
What factor determine the amount of solar energy an area receive?
latitude
Do a 60 HZ appliance use more electricity?
The amount of energy used is really unrelated to voltage. The energy usage of a piece of equipment is related to the work done, and/or heat generated by that piece of equipment. Electrical power is equal to the voltage times the current (amperage). At 240 volts, the same amount of energy is produced using 1/2 of the current (amperage) draw than is required at 110 V. For instance, a 1200 watt appliance will require 10 amps of current at 120 V (120V x 10A = 1200W). The same appliance will require 5 amps of current to do the same job at 240 V (240V x 5A = 1200W). The energy usage (1200W x time) is the same in both cases.
What affects the amount of electric energy an appliance uses?
Its resistance.
When you use an electric appliance the amount of electric energy you use depends on.?
only the appliance power
Does the amount of energy determine its amplitude?
yes
What factor determine the amount of energy you need?
fat
What determines whether a 100-W light bulb costs more to use than a 1200-W hair dryer costs to use?
The electric power used by an appliance is the rate at which the appliance converts electrical energy to other forms of energy. The electrical energy used by an appliance depends on the power of the appliance and the length of the time it is used.
What three factors determine the amount of energy required for an activity?
the three factors that determine the energy cycle are solar power, electricity, and heat.
What is the formula of energy transmission?
Energy can take different forms, and it can be transmitted in different ways. Therefore, there is not a single formula, but several, depending on the type of energy transmission. In general, the total amount of energy that arrives at the destination will be less than or equal to the amount of energy that leaves the origin.
What factor determine the amount of solar energy an area receive?
latitude
How can you determine if your appliances are energy efficient?
The "Energy Star" logo is an easy way to see if an appliance is energy efficient. You should also read the instruction manual, and know your product well enough to observe that it is working properly.
Where do you think the most enery is being used?
Believe it or not, your refrigerator uses an incredible amount of energy. If the interior of your appliance is metal, chances are it draws more energy than one that is energy efficient designed.
Will an American electrical appliance get ruined if fed 100 watts by a converter in Europe?
The amount of watts AVAILABLE to an appliance is not so significant as long as there are ENOUGH watts. Three things are important when determining what U.S. appliances can be used in Europe with converters: 1. Voltage. Most U.S. appliances operate on 110 volts. Your converter must be capable of delivering 110 volts to your appliance. 2. Current. Volts X Amps = Watts. It's a simple formula but it will determine whether your appliance will operate on a converter or just be frustrating. While volts is the "potential", Watts is a measurement of energy. It can be the energy the appliance uses or the energy that the converter delivers. If the appliance uses 200 Watts a 100 Watt converter will not work, either the appliance or the converter will fail. 3. HZ. While most appliances are not so fussy, some devices require that the electrical source be 60 HZ. Europe is 50 HZ and as such will cause some problems with appliances that require 60 HZ. FYI, HZ is the number of times per second that an electrical source reverses voltage. Commercial power is delivered as "alternating current", since that is the only way transformers can function. Europe has a different standard so make sure your appliance will operate on 50 HZ before you take it all the way over there. If the appliance does not list the energy used in Watts, it should be there in Amps, so you can use the formula above to figure out the Watts that you need. Good luck, and have a nice time in Europe.
What are three factors that determine the amount of electrical energy?
i have no idea what the answer to this question is , will someone please do it
