Question

When a flash light is switched on the electric energy:

Options

• directly changes to light energy

• first changes to light energy and then to heat energy

• first changes to heat energy and then to light energy

• none of the above

Answer 1

First changes to heat energy and then to light energy

Explanation:

In a torch, chemical energy changes into electrical energy. The electrical energy produces heat, and the hot filament gives out light. The other options do not describe this sequence of energy changes.