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Question
A bulb lights up when connected to a battery. State the energy change which takes place :
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Solution
When a bulb is connected to a battery, it lights up because of the following energy transformations:
(a) In the battery, chemical energy is transformed into electrical energy.
(b) In the bulb, electrical energy is converted into heat energy and then to light energy.
(a) In the battery, chemical energy is transformed into electrical energy.
(b) In the bulb, electrical energy is converted into heat energy and then to light energy.
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