Question

A battery light a bulb. Describe the energy changes in the process​

Answer 1

While lighting a bulb through a battery, the chemical energy of the battery gets converted into the electric energy which further gets converted into light energy along with heat energy. That is why after lighting a bulb for some time, it gets heated up.

One form of energy can be transformed to another form but it cannot be created or destroyed.

Chemical energy ➡Electric energy ➡ Light energy + Heat energy

Answer 2

It can only change its form. In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb (undesirable form).

When a bulb is connected to a battery, then the chemical energy of the battery is transferred into electrical energy. When the bulb receives this electrical energy, then it converts it into light and heat energy.

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