Electrical Principles and Technologies

Converting energy to and from electricity, controlling it in circuits, and its wider impacts.

8 questions, free, marked as you go with a worked explanation on every one.

What this covers

A device operates at 120 V and draws 0.50 A. What is its power consumption in watts?
What energy conversion happens in an electric motor?
In a series circuit with one bulb removed, what happens to the other bulbs?
What does a fuse do in a circuit?
Which are societal or environmental implications of electricity use? Select all that apply.
Why is energy efficiency an important consideration for electrical devices?
A small space heater plugged into a 120 V outlet draws a current of 8.0 A. What is the resistance of the heater, in ohms?
A 120 V kitchen circuit is protected by a 15 A breaker. On that one circuit a kettle rated at 1200 W and a toaster rated at 900 W are switched on at the same time. What total current does the circuit carry, in amperes?