Any object that possesses or can generate a magnetic field is called a ____________.
Two areas of concentrated magnetic force are called ____________ _________.
A __________ ______ is a force field that deals with magnetism.
Magnets attract only a small group of material that can also be made into excellent magnets. They are called ___________ materials.
geographic North Pole
The pole at the "top" of the earth at the axis of the earth's spin is called the __________ ______ _____.
magnetic North Pole
The pole where the earth's concentration of magnetic field lines is called _____________ _________ ______.
The earth deflects the highly charges particles of solar wind with __________ ______.
An _____________ is a solenoid with a ferromagnetic core.
A _______ spins inside a ring formed of tightly wound coils of wire.
The ring of coils surrounding the rotor is called the ____________.
AC stands for _____________ ________________.
DC stands for ___________ _____________.
The SI unit for frequency is the ______
A __________ is a machine that converts the energy of a moving fluid into rotational motion.
One type of turbine is a _________ turbine.
Another type of turbine is a _______ turbine.
A turbine that uses fuel is called a _____ turbine.
__________ are machines that convert electrical energy into rotary mechanical motion.
A ______________ can either raise or lower the voltage in an AC circuit.
Christian inventor ____________ _________ invented the telegraph and a code using dots and dashes to represent letters.