physics test

how many poles do all magnets have?

what hapens if a magnet breaks in half?

who discovered that a current-carrying wire caused a compass needle to move?

the domains are aligned in a magnet.
true or false
True False

what is the right hand rule used to demonstrate?

what kind of magnets are the strongest ones?

how can alternating current be generated?

what is the frequency of alternating current in the U.S.?

can magnetic poles be seperated?

when is the magnetic force on a charged particle or a current-carrying wire the greatest?

what has a magnetic field in the shape of circles?

where is the magnetic field on a magnet the strongest?

if an iron bar is inserted into the center of a solenoid, what happens to the domains in the iron?

whose law says that the magnetic field of an induced current is opposed by the magentic field that produced it ?

what device converts mechanical energy to electrical energy?

what device converts electrical energy to mechanical energy?

what are the threee ferromagnetic elements?

what is the process of inducing an electric current by a changing magentic field?

what is a device that changes voltage called?

who are the two men that discovered electromagnetic induction was possible?

What do scientists think causes the earth's magnetism?

what is produced when charged particles from the sun get caught in the earth's magnetic field?

whose law says that induced voltage is proportional to the number of loops of wire and the rate the magnetic field changes?

what are methods used to generate electricity?

the area around a magnet where its force is felt is called a ?

what causes magnetism?

what kind of meters can a galvanometer be made in to?

what kind of transformer lowers voltage?

what kind of transformer raises voltage?

what kind of current is sold the most today?

which pole of a magnet points toward the geographic north pole?

in what direction are the magnetic field lines drawn around a bar magnet?

how can the magnetic field be straighthened around a current carrying wire?

what is one way an iron nail can be made into a magnet?

what are two advantages of electromagnets?

what happens to the poles on an electromagnet if the current changes direction?