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science

Grade-4-

Easy

Question

In a mobile phone, the stored chemical energy changes to

Sound energy
Light energy
Both light and sound
None of these

hint Hint:

In a mobile phone, the stored chemical energy changes to both light and sound energy.

The correct answer is: Both light and sound

A mobile has cell or battery in it.

When chemical reaction occurs electron flows and the internal system works.

This finally is converted to light and sound energy which makes us see and listen to the phone.

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