Physics

# How many Joules of electrical energy does a 100 Watt light bulb consume from the electrical supply in 2 seconds?

012 ###### 2014-02-17 03:51:35

Watt means joules/second. It refers to the amount of energy a device uses, in this case. Multiply the power (in watts) by the time (in seconds) to get the energy (in joules).

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## Related Questions Joules (energy) are not equivalent to Watts (power).If something converts 6 Joules every second, it is 6 Watts. If it takes ten seconds to convert 6 Joules, its power is 0.6 Watts.Multiply the Watts by the seconds to find the Joules.CommentYou do not 'consume' power. Power is simply a rate; you cannot consume a rate! You consume energy; the rate at which you consume it is power. A joule is a joule, whether it be electrical energy or light energy - although commonly, lamps are not 100% efficient.On the other hand, you can't convert joules directly to watts. Watts means joules per second (joules / second), or equivalently, joules is watts times seconds.A joule is a joule, whether it be electrical energy or light energy - although commonly, lamps are not 100% efficient.On the other hand, you can't convert joules directly to watts. Watts means joules per second (joules / second), or equivalently, joules is watts times seconds.A joule is a joule, whether it be electrical energy or light energy - although commonly, lamps are not 100% efficient.On the other hand, you can't convert joules directly to watts. Watts means joules per second (joules / second), or equivalently, joules is watts times seconds.A joule is a joule, whether it be electrical energy or light energy - although commonly, lamps are not 100% efficient.On the other hand, you can't convert joules directly to watts. Watts means joules per second (joules / second), or equivalently, joules is watts times seconds. Power (watts) is amperes times voltage, or joules per second. Energy is joules, or watt-seconds. The length of time an electrical load is on is proportional to energy, not power. The official unit to measure energy is joules, which is equal to watt-seconds. However, power companies charge you for electrical energy in kWh; one kilowatt-hour = 3.6 million joules. Energy = power x time. If power is in watts, and time in seconds, energy will be in joules. Just divide the energy (in joules) by the time (in seconds). Answer is in watts.Just divide the energy (in joules) by the time (in seconds). Answer is in watts.Just divide the energy (in joules) by the time (in seconds). Answer is in watts.Just divide the energy (in joules) by the time (in seconds). Answer is in watts. A kilo-Watt-hour is the same as 3,600,000 Watt-Seconds (Joules). Energy = power x time. If power is in watts, and time in seconds, energy will be in joules. If power is in kilowatts, and time in hours, energy will be in kilowatt-hours. That is called "power". Energy / time = powerIn SI units: Joules / seconds = WattsThat is called "power". Energy / time = powerIn SI units: Joules / seconds = WattsThat is called "power". Energy / time = powerIn SI units: Joules / seconds = WattsThat is called "power". Energy / time = powerIn SI units: Joules / seconds = Watts  Electrical energy is measured in the same units as any other type of energy: joules. To find the energy in Joules you multiply power in Watts by time in seconds. So the sum is 60 watts x 36,000 seconds, or 2,160,000 Joules A Watt is a Joule per second. Joules measure energy and Watts measure power, which is the rate of energy used. Therefore, if you use a 60 Watt light bulb for 10 seconds, you consume 600 Joules. Electric power (how fast energy is being converted into or out of electrical energy) is measured in Watts. Electrical energy is measured in Joules. i Watt for 1 second is 1 Joule. 1000 Watts for 3600 seconds is 3.6 Megajoules, also known as a kilowatt-hour or a Unit of electrical energy. 231,000 joules is an amount of energy, while watts are a measure of how fast energy is used or converted. 231,000 joules could be used by 1 watt running for 231,000 seconds, or 231 watts running for 1000 seconds, etc. Energy = power x time, so 1000 watts for 231 seconds is an amount of energy equal to 231,000 joules. Electrical potential energy, usually measured in joules. Electrical potential is measured in volts, and that is not an energy (it is energy per charge). Electrical potential energy, just like any energy, is measured in joules. Power = energy / time, in SI units: watts = joules / seconds. Solving for energy: Joules = watts x seconds. This is not a valid question by itself. Joules are units of energy, while Amps are units of electrical current. However, if you also know the Voltage of the electrical current, you can multiply the Current[Amps]*Voltage[Volts] to get the Power in Watts. Watts are equivalent to Joules per second. If you then know the amount of time of the current flow, you can calculate the total number of Joules by multiplying the Power[Watts]*Time[seconds] = Energy[Joules] . In the SI, any type of energy is measured in joules. Power (watts) = Energy (joules) / time (seconds). Thus, Time (seconds) = Energy (joules) / Power (watts) = 90J / 40W = 2.25s 5 HP MOTOR WOULD CONSUME ENERGY OF 1342800 JOULES IN AN HOUR.EXPLANATION :-1 HP = 746 WATTSTHEREFORE 5 HP = 3730 WATTS.= 373O Joules/sec (since 1WATT= 1 Joules/sec)=3730 x 3600= 13428000 Joules/ hour. You simply can't convert between units that measure completely different tings, in this case energy (for joules), and power (for watts). The general relationship is: joules = watts x seconds Or equivalently: watts = joules / seconds  You do not 'consume' power; you 'consume' energy!Power is the rate at which you consume energy. Energy is measured in joules, so power is measured in joules per second which, in SI, is given a special name, the watt.To help you understand the difference, you can think of power as being equivalent to speed (kilometres per hour) and energy equivalent to distancetravelled (kilometres).

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