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Since pure resistance refers to the resistance that converts electric energy into heat energy, why does the bulb belong to pure resistance? Isn't it also converted into light energy?
There are three forms of heat transfer
Conduction, convection and radiation,
Light radiation is also a form of heat energy,
85-90% of the heat of tungsten filament in incandescent lamp is radiated by conduction and convection, and 15-10% is radiated by light
When the electric light in the classroom lights up, the energy consumed is a electric energy B light energy c electric energy
The most direct is definitely electricity
But electricity may come from chemical energy
RELATED INFORMATIONS
- 1. Can we say that when a small light bulb emits light, it converts electric energy into heat energy
- 2. The power of lamp a is 60W, which means that the current passing through the filament is within 1 second () 1. The power of lamp a is 60 watts, which means that the current passing through the filament will convert () electric energy into heat energy and light energy in 1 second (). If the power of lamp B is 40 watts, compared with lamp A and lamp B, the one that converts electric energy into heat energy and light energy in 1 second is () lamp, and the brighter one is () lamp. So the brightness of the bulb is determined by () size 2. A small bulb marked with "2.5V, 0.36A", the number "2.5V" means (). If it is used in a 2V circuit, the measured current through it is 0.25A, then the rated power of the small bulb is (), and the actual power is () 3. If a motor works normally under 6V voltage and the current passing through is 2a, the motor will consume () joules of electric energy when it works normally for 1 minute
- 3. The higher the power of the appliance, the more work the current does The greater the power of the appliance, the faster the current does work, right?
- 4. Electric energy is consumed when working with electrical appliances. Twenty days is the energy that the electric current converts into by doing work with electrical appliances
- 5. () are all a light energy B heat energy c electric energy converted from other forms of energy
- 6. Examples of conversion of mechanical energy into thermal energy
- 7. Transformation of mechanical energy into heat energy in daily life I'll use it in class in an hour
- 8. Friction between hands produces heat
- 9. Why does friction heat up
- 10. Physics -- an example of using sound energy People use sound energy to do things. Who knows some examples of this,
- 11. Is solar energy used as power in space flight Solar panels collect solar energy and convert it into electric energy. Is electric energy converted into kinetic energy? It seems that the motor I think of can't provide power in vacuum. What can I do? Can I only rely on the fuel I carry? Let's not talk about the solar sail. I know that
- 12. What is energy, such as light energy, electric energy, etc Is energy matter
- 13. When the electric current passes through the electric bulb, the filament becomes hot and emits light. At this time, the electric energy is converted into () energy and () energy
- 14. From the point of view of energy conversion, this paper explains why the sound is bigger than the sound is smaller and consumes more electric energy when the TV is working at the same time Such as the title
- 15. 1. Solar energy, wind energy, tidal energy, nuclear energy, which is non renewable energy?
- 16. Why does wind energy come from solar energy? I wish I were more careful
- 17. The wind speed of strong wind in a certain place is 20m / s, the air density is p = 1.3kg/m3, and the effective wind area of a wind turbine is s = 20m2 After the wind turbine, the wind speed becomes 12m / s, and the efficiency of the wind turbine is 80%, then what is the electric power of the wind turbine
- 18. The strong wind speed of a certain place is 14m / s, the air density is 1.3kg/m ^ 3, and the wind with cross-sectional area of 400m ^ 2 makes the wind turbine rotate, If 20% of its kinetic energy is converted into electric energy, how many watts of power is generated? (the air to the wind blade in T seconds is contained in a cylinder with s as the bottom area and L = VT in length)
- 19. What is the generating power of the hydro generator? (g = 10N / kg)
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