Electric Circuits Quick Check
1. A circuit in a home provides power to a light fixture. The homeowners want to use a compact fluorescent bulb instead of an incandescent bulb. Compact fluorescent bulbs can produce as much light as incandescent bulbs but with less energy. How is this possible?
answer: Incandescent bulbs produce other forms of energy, too, including heat.
2. The batteries of some flashlights can be charged by turning a handle. Which energy transformation is happening in this process?
Answer: kinetic to electrical to chemical
3. How does the power switch on a computer work?
Answer: Turning the switch on completes the circuit between the power source and the load.
4. What is chemical energy?
Answer: energy stored in the bonds between atoms and molecules
5. Which energy transformation occurs when you rub your hands together to warm them?
Answer: kinetic energy to thermal energy
How does the power switch on a computer work?(1 point)
A. Turning the switch on causes the conductors to release electrons.
B. Turning the switch on turns on the parts that convert electrical energy to other forms.
C. Turning the switch on activates the power source to allow electrons to flow.
D. Turning the switch on completes the circuit between the power source and the load.
1 answer
1 answer