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How many kilowatt hours - KWh - are used to light a 30 watt light bulb for 1 hour?
A kilowatt is 1,000 Watts. 30 Watts is equal to 0.03 kilowatts. A kWh or kilowatt-hour is the rate of electrical usage. It is a measure of kilowatts used per period of time (1 hour). 1 kWh is 1 kilowatt (1,000 watts) for 1 hour. So, multiply your 30 watts (0.03 kilowatts) by 1 hour to get kWh. =0.03 kWh In about 33 hours and 20 minutes, this lamp would use 1 kWh.
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How long does it take for a 100 watt light bulb to cobsume 100 units of energy?
Simple 10,000 hours cause it completes 1 unit in 10 hours.....
How do you compute electrical consumption of a device?
A simple electrical device is a 60 watt light bulb. The bulb is consuming 60 watts of electricity from the moment you turn it on. If you keep that light bulb on for 10 hours the power used is 60 watts x 10 hours = 600 watts of power. Electricity is sold in Kilowatt Hours. A Kilowatt is 1000 watts of power. Depending on the state you live in, it sells for 7 to 18 cents per Kilowatt Hour. So if you leave that light bulb on 10 hours per day for 30 days you will have used up 600 watts x 30 days = 18,000 watts of electricity = 18 Kilowatt Hours. At an average cost of 10 cents per Kilowatt Hour that bulb costs you $1.80 per month to leave on. The formula is watts x time x cost per Kilowatt Hour = cost of use...Answer provided by Gene Evangelist
How much does it cost to run a 70watt light bulb for 1 hour?
Assuming an electricity rate of $0.12 per kilowatt-hour, running a 70-watt light bulb for 1 hour would cost $0.0084 or 0.84 cents. This calculation is done by converting watts to kilowatts (70W = 0.07 kW) and then multiplying by the cost per kilowatt-hour.
How much does it cost to burn a 100W light bulb for 24 h if electric energy costs 0.080 per kilowatt-hour?
To calculate the cost of running a 100W light bulb for 24 hours, first convert the wattage to kilowatts (100W = 0.1 kW). Then calculate the energy consumed in kilowatt-hours (0.1 kW * 24 h = 2.4 kWh). Finally, multiply the energy consumed (2.4 kWh) by the cost per kilowatt-hour ($0.080) to find the total cost ($0.080 * 2.4 kWh = $0.192).
What is the amount of energy used in one hour by 10 100 w light bulbs?
The total energy used in one hour by 10 100W light bulbs is 1 kWh (kilowatt-hour). To calculate this, you multiply the power of each bulb by the number of bulbs and the time they are on. In this case, 100W * 10 bulbs * 1 hour = 1000 watt-hours = 1 kWh.
How many kilowatt hours KWh are used to light a 30 watt light bulb in 8?
To calculate the kilowatt hours (kWh) used by a 30 watt light bulb in 8 hours, we first convert the power to kilowatts: 30 watts = 0.03 kilowatts. Then, multiply this by the time in hours: 0.03 kW * 8 hours = 0.24 kWh. So, 0.24 kWh are used to light a 30 watt light bulb in 8 hours.
How many kwh does a 200w light bulb use?
In ten hours, a 200W bulb will use: 10 * 200 = 2000 Watt-hours = 2 kwh
How much electricity costs when a light bulb is on for a long period of time?
The cost of electricity for a light bulb being on for a long time depends on the wattage of the bulb, the electricity rate per kilowatt-hour, and the duration it is on. To calculate the cost, you can use the formula: (Wattage of bulb / 1000) * hours on * cost per kilowatt-hour.
How much does 40 kilowatt bulb use in 1 hour?
Anything that uses 40 kilowatts would use 40 kilowatt-hours for each and every hour.
How many hours of operation with a 60 watt light bulb will one kilowatt hour give you?
The idea is to divide the energy by the power used. First, convert the units to make them consistent. For example, you might convert kilowatt-hours to watt-hours.
How many kwh does a 400w bulb use in an hour?
Well 1 KWh is "1000 watts per hour". So if you have 400w per hour take400watts per hour divided by 1000 and it shows that you get "0.4KWh".AnswerThere is no such thing as a 'kilowatt per hour', which is why the unit of measurement is a 'kilowatt hour', and NOT a 'kilowatt per hour'!.To determine the number of kilowatt hours of energy consumed by the lamp, multiply its power, expressed in kilowatts, by the length of time it is in use. For your example, the answer is 0.4 kWh.
How much does it cost to run a light bulb?
It depends on the bulb, how many watts it is. All bulbs are marked with the correct voltage and the power taken, in watts. You multiply the watts by the number of hours to find the watt-hours of energy used. Then divide by 1000 to find the kilowatt-hours. A kilowatt-hour is also called a unit and you pay about £0.15 for a unit of electricity. Let's say it's a 100 watt bulb running for 24 hours. That uses 2400 watt-hours or 2.4 kilowatt-hours, which costs about 2.4 x £0.15 which is £0.36.
How much a hour does 100 watt bulb use at 15p?
A 100 w light bulb uses one tenth of a kilowatt of power, therefore in 1 hour it uses one tenth of a kilowatt-hour of energy, that is 0.1 units, or 1.5 p.
How much will it cost to run a 100 watt light bulb for one hour if electricity costs ten cents per kilowatt hour?
Converting 14 watts to kilowatts: 14 watts x (1 kilowatt / 1000 watts) = 0.014 kilowatt. Your energy consumption for one (1) hour is 0.014 kilowatt x 1 hr, this is equal to 0.014 kilowatthour. Cost for energy consumption: 0.014 kilowatthour X (20.52 cents / kilowatthour) : 0.28728 cents only
How much does it cost to light a 100 Watt light bulb 10 hours a day?
To calculate the cost of lighting a 100-watt bulb for 10 hours a day, first convert watts to kilowatts: 100 watts = 0.1 kilowatts. If the bulb is used for 10 hours, that totals 1 kilowatt-hour (0.1 kW x 10 hours). Assuming an average electricity cost of about $0.13 per kilowatt-hour, it would cost approximately $0.13 per day to run the bulb. Over a month, this would amount to about $3.90.
How many kilowatt hours does a 100 watt light use in 20 hours?
First let us convert the power of the bulb into kilowatts.A kilowatt is 1000 watts. We have one tenth of that. So 100W = 0.1kWTo work out the kilowatt hours we simply multiply the power in kilowatts by the time the bulb is on for (in hours):0.1kW x 10h = 1 kWha 100 watt bulb uses 100 watts of power. In ten hours it uses 100x10 watt-hours, or 1 kilowatt-hour. A kilowatt-hour is also called a unit, and units are what you pay for.
How much does it cost to run a 60 watt light bulb for 1 hour if electricity costs 10 cent per kilowatt-hour?
1 kilowatt-hour is 1000 watt-hours and 60 watt bulb consume during 1 hour 60 watt-hours of electricity, so then it costs 0.6 cent =>60/1000=0,06*price of 1 kilowatt-hour = 0.6 cent
