Chapter 6
Lessons 1 and 2
Lessons 1 and 2
The force between charged objects.
A region around a charged object where the object's electric force is exerted on other charged objects.
What is electric force and electric field?
A law that describes how voltage, current, and resistance are related.
What is Ohm's law?
What are the properties of magnets?
Magnets attract iron and materials that contain iron.
Magnets attract or repel other magnets.
One end of a magnet will always point north if allowed to swing freely.
Define solenoid.
A coil of wire with a current.
What is static discharge?
The loss of static electricity as electric charges transfer from one object to another.
What are the 4 ways that charge builds up static electricity?
Friction, conduction, induction, and polarization.
What is a circuit made of?
All electric circuits have these basic features:
Device that runs on electrical energy,
Sources of electrical energy,
Conducting wires.
Define magnetic pole.
The ends of a magnet. They are labeled north and south.
Define electromagnetism.
The relationship between electricity and magnetism.
What is resistance?
The measure of how difficult for charges to flow through an object.
What is an electric current?
An electric current is the continues flow of electric charges through a material.
What is a series circuit?
A circuit that has only one path for the current to take.
What is a magnetic field's shape?
How are electric currents and magnetic fields related?
An electric current produces a magnetic field.
Define magnetic force.
The attraction or repulsion between magnetic poles.
How is electric current made?
When electric charges are made to flow through a material, they produce an electric current.
What is a parallel circuit?
A circuit where there are several paths for the current to take and each bulb is connected by a separate path from the battery and back to the battery.
How is Earth like a magnet?
Earth has a magnetic field around it and two magnetic poles.
What is a magnetic field produced by a current like?
The magnetic field produced by a current has a strength and a direction, the field can be turned on or off, have its direction reversed, or have its strength changed.
What are the three materials that are attracted to magnets?
Iron, cobalt, and nickel.
What affects current flow?
Define magnetic field.
The area of magnetic force around a magnet.
What are the characteristics of solenoids and electromagnets?
Both solenoids and electromagnets use electric current and coiled wires to produce strong magnetic fields.
Define polarization.
When atoms have charged ends that are attracted to charged objects.