Another lightbulb has a power of 12 W. It has an efficiency of 80%. Calculate the amount of time taken in seconds for the bulb to transfer 300 J of energy into light energy.

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential