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When you turn on a light bulb you are observing the law of conservation of energy at work How is the law of conservation of energy at work in the light bulb?
Wiki User
∙ 12y ago
When an electric current flows through the lamp filament, it is doing work (W) on that filament. This causes the internal energy (U) to rise which, in turn, causes its temperature to rise. Because the temperature is now higher than the surrounding temperature, heat(Q) transfer takes place to the surroundings.
The change in internal energy of the filament is equal to the following:
change in U = W - Q
This equation accounts for all changes in energy in the filament.
Wiki User
∙ 12y ago
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When the light bulb is lit electrical energy is changed into light energy and?
When lighting a light bulb, it is changed into light and heat/thermal energy.
What useful energy comes out of a light bulb?
light energy
Where does the energy for a light bulb come from?
it come from the energy source in the middle of the light bulb he clearly asked what type of energy is it?!
If you were to turn on a bulb in a dark closet. Light and heat would be produced. if thinking on conservation of energy why do the walls or floor not emit light when the bulb is off?
A common conservation message is " .. 60% of the heat just goes out the windows/doors/walls ...".In fact all the energy goes from the building, otherwise it would get over hot.It is the timescale of the loss of energy that is important, and this may be changed by proper design and construction.Have a look at passive solar in an on-line encyclopedia. And use the information when you can!
A light bulb changes electrical energy to what other kinds of energy?
Heat and light
Explain the difference between energy efficiency and energy conservation Give an example of each?
Efficiency is a measure of how completely you use energy, whereas conservation is a measure of how little energy is used. For example: A typical light bulb turns 2% of the power input into light, therefore it is 2% efficient. Not turning the light bulb on in the first place uses no power, and therefore conserves electricity.
Why did they Call Lyndon Johnson Light Bulb Lyndon?
Lydon Johnson became known as "Light Bulb Lyndon" because of his strong advocacy for energy and conservation policies, particularly the promotion of the use of more energy-efficient light bulbs.
What transformations occur in a light bulb?
In a light bulb, electrical energy is transformed into light energy and heat energy.
What is the source of energy in a light bulb?
Electricity is the source of energy in a light bulb.
What is most of the energy produced by a light bulb?
Most of the energy in a light bulb is heat energy.
When energy runs through a light bulb what kind of energy does the light bulb produce?
A light bulb uses electrical energy, and produces light, as well as heat.
What energy occurs in the light bulb?
light and heat energy occur in a light bulb when it is turned on.
What energy transformation occurs in a bulb?
In a light bulb, electrical energy is transformed into light energy and heat energy.
Is a light bulb an example og electromagnetic energy?
A light bulb is not an example of electromagnetic energy, but the light which the bulb gives off is an example of electromagnetic energy.
Which statement is an example of the law of conservation of energy?
A soccer ball eventually stops because its energy disappears. When a light bulb is turned on, electrical energy is converted to light and heat. An automobile engine burns gasoline to converts its chemical energy to electrical energy.
When the light bulb is lit electrical energy is changed into light energy and?
When lighting a light bulb, it is changed into light and heat/thermal energy.
How is light bulb a form of energy?
A light bulb IS not a form of energy, it CONVERTS energy. A lightbulb converts electricity into heat and visible light.
