Chapter 3B
Electricity and Magnetism
1. What is electric current?
Vocabulary
resistance a measure of how much material opposes the flow of electric current and changes electric current into heat energy
conductor a material through which electric current passes easily
insulator a material through which electric current does not pass easily
series circuit a circuit that connects several objects one after another so that the current flows in a single path
parallel circuit a circuit that connects several objects in a way that the current for each object has its own path
magnet anything that pulls iron, steel, and certain other metals to it
magnetism the force around a manget
magnetic field the space around a magnet where magnetism acts
pole a place on a magnet where magnetism is strongest
compass a small magnet that can turn freely
generator a machine that uses an energy source and a magnet to make electricity
electromagnet a magnet made when an electric current flows through a wire