Lesson 1 B64
What is an electrical current?
The flow of negative charges through matter.
What can you use so you won't unload an outlet?
A powerstrip
What is a magnetic field?
A space around a magnet where magnetism acts.
What is a generator?
A machine that uses an energy source and a magnet to make electricity.
What is resistance?
A measure of how much material opposes the flow of electric current into heat energy.
What is an insulator?
A material through which electric current does not pass easily.
What is a parallel circuit?
When each bulb has its own path. (it connects several objects in a way that the current for each object has its own path)
What is a compass?
A small magnet that can turn freely.
True or false: a generator needs a battery.
True.
What is a conductor?
A material through which electric current passes easily.
What happens if you put a positive and negative charge together?
They will be attracted.
Does an electric current flow through a closed or open circuit?
Closed.
What is the place on a magnet which the magnetism is the strongest?
The poles.
What is one appliance that uses electromagnets to work?
A doorbell, a fan, a telephone.
What is a series circuit?
A circuit that connects several objects.
What's one way you can make small electric charges?
What is one way you can use electricity safely?
Replace cords, unplug appliances, move papers, unload outlets by using a power strip, and keep electronics dry.
What is the name for a magnetic rock?
A lodestone.
What are generators used for?
They are used for back-up electricity if the power goes out.
What is magnetism?
The pulling or pushing force that exists around a magnet.