True or False
True or false? An electric current can be produced in a conductor.
True
A constantly reversing current.
What is an alternating current.
A device that has a magnet on a needle that spins freely.
What is a compass.
The area of magnetic force around a magnet.
What is the magnetic field.
A magnet can make, or induce, current in a conductor, such as a wire, as long as there is ____.
What is motion.
True or false? Electromagnets are used in electric motors, earphones, and heaters.
False.
A current with charges that flow in one direction.
What is a direct current.
A device that transforms mechanical energy into electrical energy.
What is a generator.
a magnetic field's shape.
What is circular.
When either the wire, coil, or the magnet moves, the galvanometer registers a ____.
What is a current.
True or false? Oersted's results showed that magnetism and electricity are related.
True.
The relationship between electricity and magnetism.
What is electromagnetism.
A device that measures small currents.
2 north poles on a magnet do what.
What is repel.
In a transformer the voltage in the primary coil is ___ times higher than the voltage in the secondary coil.
True or false? Moving the coil or the magnet induces the current without any voltage source.
True.
a solenoid with a ferromagnetic core.
What is an electromagnet.
A device that increases or decreases voltage.
What is a transformer.
the lines that map out the invisible magnetic field around a magnet.
The greater the difference between the number of loops in the primary and secondary coils in a transformer the more the ____ will change.
What is voltage.
True or false? the attraction or repulsion between magnetic poles is magnetic interactions.
False
Generating electric current from the motion of a conductor through a magnetic field.
What is electromagnetic induction.
What is a electric motor.
The angle between these two lines is the angle between geographic north, and the north to which a compass needle points.
____ and _____ each found that motion in a magnetic field will induce a current. (This is the daily double.)
Who is Michael Faraday and Joseph Henry.