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Well 1 KWh is "1000 watts per hour". So if you have 400w per hour take
400watts per hour divided by 1000 and it shows that you get "0.4KWh".
Answer
There 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.
What else can I help you with?
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 many kWh will a 32 watt fluorescent bulb use?
A 32 watt bulb uses 32 watt-hours, or 0.032 kWh, every hour it is used.
How many kwh is used by a 60 watt bulb?
A kilowatt is 1,000 watts. A 60 watt bulb uses 60 watts in an hour. So, in half an hour it uses 30 watts. Now if a kilowatt costs 20 cents, what does 0.03 kilowatt cost?
How many killowatts will a100 watt bulb use per hour?
I kW = 1000 W 100 / 1000 = 0.1 So a 100 W bulb uses 0.1 kW For one hour that's 0.1 kWh
How many kwh does a 45 watt bulb use?
A kilowatt hour (kWh) is used to measure energy consumption. It is defined as 'the energy consumed, over a period of one hour, at a rate of one kilowatt'.To determine how many kilowatt hours are consumed, you must multiply the power of the lamp, expressed in kilowatts, by the length of time it is in use, expressed in hours.So, a 45-W lamp will use: (45/1000) x 1 = 0.045 kWh per hour of use.
How much money would a 400w heater use per hour?
To calculate the cost per hour for a 400W heater, you need to know the electricity rate per kilowatt-hour (kWh) charged by your utility company. For example, if the rate is $0.12 per kWh, a 400W heater would use 0.4 kWh per hour (since 400W = 0.4 kW). Multiplying 0.4 kWh by $0.12 gives you a cost of $0.048 per hour to run the 400W heater.
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 many kWh on watt?
KWH stands for kilowatt hour, meaning a thousand watts used for an hour. In terms of, for example, the familiar 60 watt light bulb, you would need (just under) 17 such light bulbs operating for an hour to consume 1 KWH.
How many kWh will a 32 watt fluorescent bulb use?
A 32 watt bulb uses 32 watt-hours, or 0.032 kWh, every hour it is used.
How many kwh is used by a 60 watt bulb?
A kilowatt is 1,000 watts. A 60 watt bulb uses 60 watts in an hour. So, in half an hour it uses 30 watts. Now if a kilowatt costs 20 cents, what does 0.03 kilowatt cost?
How many killowatts will a100 watt bulb use per hour?
I kW = 1000 W 100 / 1000 = 0.1 So a 100 W bulb uses 0.1 kW For one hour that's 0.1 kWh
How many kwh does a 45 watt bulb use?
A kilowatt hour (kWh) is used to measure energy consumption. It is defined as 'the energy consumed, over a period of one hour, at a rate of one kilowatt'.To determine how many kilowatt hours are consumed, you must multiply the power of the lamp, expressed in kilowatts, by the length of time it is in use, expressed in hours.So, a 45-W lamp will use: (45/1000) x 1 = 0.045 kWh per hour of use.
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.
How much energy does a 60 watt bulb use per hour?
A 60W bulb will use 60W X 1 hour / 1000. this will give you the KWh - the units your electricity company uses to charge you.So 60 X 1 =6060/1000 =0.060 Kwh
How do i convert KWh by wind into electricity units?
good question A KWH is 1000 watts of power used for one hour. A 100 watt bulb would need to be on for 10 hours to use 1 KWH.
What is the power required for a PC for half an hour backup?
Depends on the size of the pc.. but. assuming a 400W psu, and a 30W lcd screen. 215Wh would be the amount of power it uses or 0.215 kWh or 774 kJ
How much power is used by a 35w bulb with 12v supply vs 110v supply?
it also depends on what meter you have, is it a KWH METER or a AH METER. IF ITS A KWH METER(KILO WATT HOUR) IT COUNTS IN WATTS (35w PER HOUR.)
