Is turning on a light bulb on a physical or chemical change?

Answer 1

The reason why turning on a light bulb is a physical change is because there is a process of electrical energy being converted into light and heat. You still have the light bulb intact and no new substance is formed.

Answer 2

There is no chemical or atomic change to the filament (incandescent) or gas (fluorescent). Once the light bulb is turned off, the filament or gas will return to the normal state and temperature.

Answer 3

No. It is a physical change, as to put it in layman's terms you're just heating the filament. Chemical composition is not altered. Note that the light emitted is NOT from an energy exchange as seen in a chemical reaction

Answer 4

In a light bulb light is produced either by heating a tungsten filament to incandescence or by exciting the electrons of Mercury vapor. Either way, the chemical compositions of the components of the light bulb remain the same. They would have to change in some part of the process for this to be considered a chemical change.

Answer 5

In incandescent light bulb you heat thefilament to very high temperature. So that it becomes red hot and emits light. To prevent the filament from getting oxidized, you have have an inert gas filled in the bulb. Inert gas means 'noble'gas like Helium, Neon, Argon, Krypton. These gases do not take part in chemical reactions. So this is purely a physical change. Only about 5 % energy is converted to light and rest being emitted as heat radiation. You have designed the length and thickness in such a way to to give different amount of 'light'. Also the 'life' of bulb is designed. You can make a filament thicker and longer to increase the 'life' of bulb. But this is not done in order that next bulb should be sold and industry must go on.

Answer 6

This is a physical Change When the electrons go through the filament, the filament is going though no chemical change, only the physical change of temperature
It is a physical process.

Answer 7

Glowing (heating) of the bulb's filament due to the flow of current through it, is a physical change. The current supplied by the battery is due to chemical change within the battery.

Answer 8

physical change

Answer 9

It is a physical process.

Answer 10

No.