Identify the energy transformations that take place in a
battery
-powered
flashlight:
1. Chemical energy in the battery is converted to electrical energy when the flashlight is turned on. This is achieved through a chemical reaction in the battery that causes electrons to move from the negative terminal to the positive terminal.
2. The electrical energy then powers an incandescent bulb or LED in the flashlight, where it is converted into light energy. This occurs when the electrons flow through the filament or semiconductor material of the bulb, causing it to emit light.
3. Some of the electrical energy is also converted into thermal energy due to the resistance in the wires and bulb. This is why the flashlight can become warm after prolonged use.
In summary, the energy transformations in a battery-powered flashlight include the conversion of chemical energy to electrical energy, electrical energy to light energy, and a small amount of electrical energy to thermal energy.