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Since the light bulb is purely resistive (has very little reactance), you can just measure the RMS voltage across the light bulb (usually 120 V) and the RMS current going through the light bulb. Power (P) is:P = VRMS x IRMSwatts
Joule is a unit of energy, watt is a unit of power. Power is energy per time unit. In a way, those are incompatible units, but if you know in what time you spend a certain amount of Joule, you can convert to Watt, and vice versa. For example, if you use 200 Joule in 2 seconds, that is 200/2 = 100 Joule/second, or 100 Watts. Or, if a light-bulb uses 35 Watts, that is 35 Joules every second, so in an hour it will use 35 x 3600 = 126000 Joules, or 126 KJ.
the 3 types are......... power outlet a light bulb thats all i can think of
The Joule is a unit of energy, while the Watt is a unit of power. Joule is the alternate name for a Newton-meter of energy, and Watt is the alternate name for a Newton-meter per second of power. This means that one Watt is one Joule per second; a 100-Watt light bulb converts 100 Joules of electrical energy every second into heat energy and light energy.
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The work done by a 100-watt light bulb when lit for 30 seconds can be calculated using the formula work = power x time. Power = 100 watts, Time = 30 seconds. Work = 100 watts × 30 seconds = 3000 joules.
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.
The power rating for a light bulb (like "40 W") tells how much electrical power the light bulb uses. All of the power used by the bulb is either converted into light or heat. In an incandescent bulb, most of the energy becomes heat. In a fluorescent bulb, more of it becomes light.
That depends on the power used by each light bulb. Look at the specifications for a specific light bulb, then multiply the power by 10. Note that energy = power x time; that is to say, the energy spent by a light bulb depends on its power, but also on how long you keep it on. Specifically, watts = joules x seconds.
Wiring for power in buildings is in parallel. If it was in series every time a light or power switch was turned off, the entire building would be turned off. This can be seen with Christmas tree lights when one bulb blows every bulb goes out.
Power = energy / time, in SI units: watts = joules / seconds. Solving for energy: Joules = watts x seconds.
To calculate the energy used by a 60-watt light bulb in joules, you need to convert the power (watts) to energy (joules). First, convert watts to joules per second (1 watt = 1 joule/second), then multiply by the time the light bulb is on. So, for example, if the light bulb is on for 1 hour (3600 seconds), the energy used would be 60 watts * 3600 seconds = 216,000 joules.
The power of a light bulb is typically measured in watts and indicates how much energy the bulb consumes. A higher wattage bulb will produce more light but also consume more energy. LED bulbs are more energy-efficient and have lower power consumption compared to traditional incandescent bulbs.
The energy in a flash can be estimated from the voltage, current and time. If it's 10 million volts and 100,000 amps that is 1012 watts, and if it lasts for 10 microseconds (10-5 seconds) the energy would be 107 Joules, which would power a 100 w bulb for 105 seconds, or 28 hours.
The energy transferred by a 100 Watt bulb in 10 seconds can be calculated using the formula: Energy (joules) = Power (Watts) x Time (seconds). Plugging in the values, the calculation would be 100 Watts x 10 seconds = 1000 joules.
In 2 seconds, a 100 Watt light bulb consumes 200 Joules of electrical energy from the electrical supply (100 Watts * 2 seconds = 200 Joules).
The power rating of the bulb indicates how much power it uses. The power in watts indicates how much energy in Joules the bulb uses in one second. A bulb should have its voltage and power printed on it.