The electric power consumed in operating a 60 watt bulb for 3 hours a day in a month of 30 days is

• How much electrical energy is consumed by a 30 W bulb in 5 minutes?

  A one watt bulb consumes 1 joule of elecrical energy every second. To calculate the total amount of energy consumed in your example, multiply (1 joule/second) x (30 watts) x (5 minutes) x (60 seconds/minute) = 9000 joules. Joules are a very small unit of energy, useful for problems like this one with a small unit of energy. Energy companies use a unit called the kilowatt-hour instead. 9000 joules = 0.0025 kilowatt hours.

• If 100V is applied across a 200V, 100W bulb, what will be the amount of power consumed?

  This formula is complicated for light bulbs, since the amount of heat produced changes the properties of the light bulb filament. From a practical standpoint, the bulb will be extremely dim. It's best to use a circuit as close to the bulb's rated voltage as possible. Using a higher voltage is even worse, since the bulb could overheat or explode.

• Is 1.5 volts more or less than 20 watts?

  They measure two different things, so you cannot compare them directly. The watts are a measure of power, and that's what you need to calculate kilowatt-hours and electricity costs. Voltage is a property of the battery or household electrical circuit. If "1.5 volts" is printed on a bulb, that bulb is designed to be run off a 1.5 volt battery.

• How many KWH does it take to turn on a 60-watt light bulb?

  A 60-watt incandescent lamp will require 60 watts : 120 volts = .5 amperes after turning it on, but at first, it will require 12 - 16 times that amount, about 12 x .5 amperes = 6 amperes for a fraction of a second. To convert it to KWH will be 6 x 120 = 720 watts x about .1 seconds, which will give you .072 KWH.

• How do I calculate and compare the energy use of two different watt bulbs over the same period of time?

  1 KWh = 1000 W over a period of one hour. A 60 W light bulb over a period of one hour = 0.06 KWh. 100 W light bulb over a period of one hour = 0.1 KWh.

• If I am using a 1.5 volt battery to power a 20 watt lightbulb, what is the amperage?

  Amps = Watts / Volts (or Current = Power / Voltage), so the current in your circuit is equal to (20 watts) / (1.5 volts) = about 13.3 amps. Note that you do not need to know the current for any of the calculations in this article.

• What does it means when a light bulb says "9 watts 2000 hours"?

  The number of hours is an estimate of the bulb's lifespan. It does not affect the kilowatt-hour calculations.

• How much energy does a 25-watt light bulb consume in a day?

  Depends on how long it's on. It consumes no energy if it's not on. But if you have it on 24/7, it would consume 18kwh per month. or $1.98/mo if being charged 11 cents per kwh.

Text Solution

Solution : Electric power, `(P) = 60 W = 60/1000 = 0.06 kW` <br> Time , `(t) = 10 hrs` <br> Electric energy, `=P xx t` <br> `= 0.06 xx 10 = 0.06 kWh = 0.6` unit

LED or the light-emitting diode light bulb is a good energy efficient option for lighting, often beating out CFL light bulbs in power efficiency and longevity at a similar price. A typical cheap (60 watt equivalent to incandescent) LED light bulb is advertised as providing 800 lumens, lasting up to 10,000 hours at 10 watts.

Click calculate to find out the electricity cost of a single LED light bulb running at 10 Watts for 5 hours a day @ $0.10 per kWh, you can also modify the input fields if needed.

Hours Used Per Day: Enter how many hours the device is being used on average per day, if the power consumption is lower than 1 hour per day enter as a decimal. (For example: 30 minutes per day is 0.5)

Power Use (Watts): Enter the average power consumption of the device in watts.

Price (kWh): Enter the cost you are paying on average per kilowatt hour, our caculators use the default value of 0.10 or 10 cents. To find an exact price check your electricity bill or take a look at Global Electricity Prices.

Comparison Between LED, CFL and Incandescent Light Bulbs:

* Assuming 5 hours a day @ $0.10 per kWh.

LED lighting has become very common in the last few years, combined with government programs for energy reductions in some regions, LED light bulbs could be obtained for very cheap with special discounts. However with price reductions, quality control and decrease in longevity has also been observed.

Financially it may not be worth the hassle to purchase expensive LED light bulbs with significantly higher longevity ratings, at the same time it may be more environmentally friendly. The choice is up to you, we recommend to read reviews and try LED light bulbs yourself. Overall LED lighting is a great option for energy savings and far superior to the old incandescent lights.

An incandescent light bulb also known as an incandescent lamp is an electric light with a wire filament which produces light when current passes through it. Incandescent lighting is cheap to produce but is very inefficient, converting only 5% of the energy into light.

Click calculate to find out the electricity cost of a single incandescent light bulb running at 60 Watts for 5 hours a day @ $0.10 per kWh, keep in mind you can edit the numbers in the calculator.

Hours Used Per Day: Enter how many hours the device is being used on average per day, if the power consumption is lower than 1 hour per day enter as a decimal. (For example: 30 minutes per day is 0.5)

Power Use (Watts): Enter the average power consumption of the device in watts.

Price (kWh): Enter the cost you are paying on average per kilowatt hour, our caculators use the default value of 0.10 or 10 cents. To find an exact price check your electricity bill or take a look at Global Electricity Prices.

Comparison Between LED, CFL and Incandescent Light Bulbs:

* Assuming 5 hours a day @ $0.10 per kWh.

Incandescent light bulbs have been discontinued from sale above a certain wattage in many regions, as they are not very energy efficient. If you are still using incandescent lighting, it is highly recommended you switch to LED or CFL lighting to save energy and increase the longevity of your light bulbs.