ELECTROMAGNETISM Crossword

a device use to measure very small currents
two oppsite ends, called poles
a poor conductor of electric current whose electric charges partially align with an electric field
a magnet whose magnetic field is produced by electric current
the process of generating current through a wire in a circuit in a changing magnetic field
each form of the same atom that has the same chemical properties but a different mass
exists in a space where magnets would experience a force
number of magnetic passing through a surface perpendicular to the lines
an instrument that measures the charge-to-mass ratio of positive ions within a material
device that converts voice, music, pictures, or data to electronic signals, amplifies signals, and then sends the signal to an antenna
device that increases or decrease potential differences with relatively little waste of energy
create the electromagnetic waves that propagate through the air
a specific wave length in the radio part of the electromagnetic spectrum
a group of neighboring atoms whose poles are aligned
generated in any piece of metal moving through a magnetic field; the magnetic they produce opposes the motion that caused the currents
oscillating electric and magnetic fields that propagate through space and matter
secondary potential difference is smaller than primary potential difference
secondary potential difference is larger than primary potential difference
converts mechanical energy to electrical energy
magnetic resonance imaging
a coil or loop of wire
electromagnets lift this off the tracks and move it forward
a magnet that retains its magnetic properties in the absence of an inducing field or current
changes electrical energy into mechanical energy
a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power
an attachment, connected to the armature of a motor or generator, through which electrical connection is made and which ensures that the current flows as direct current.
a coil of wire that carries an electric current, therefore produces a magnetic field
even higher frequncy than ultraviolet rays and has enough energy to go through the skin and the muscle
the wide range of electromagnetic waves with different frequencies and wavelenghts
term for the iron ore that is a natural magnet
term for a rotating solenoid
AC current changes direction at 60 _____ (unit)
the interaction of charges without contact; principle used to make magnets and in transformers
besides iron and nickle, a common ferromagnetic metal
the first person to discover that a current in a wire produces a magnetic field
device that uses the earth's magnetic field to determine direction
the first people to study magnetism
the most common ferro-magnetic metal