The Nature of Magnetism
Magnetic Domains
Electric Current and Magnetic Field
Meters to Motors
Deflecting Forces
100
Type of rock found in the town of Magnesia in ancient Greece.
What is a loadstone?
100
clusters of aligned atoms.
What is a magnetic domain?
100
Produced by the motion of electric charges.
What is a magnetic field?
100
Replaces permanent magnets in AC and DC large motors.
What is an electromagnet?
100
Strength of the deflecting force when the moving charged particle intercepts the magnetic field lines at an angle.
What is weak?
200
The magnetic field on a magnet is the greatest at this location.
What are the poles?
200
Amount of atoms in aligned domains.
What are billions?
200
Electric charges in motion have these two fields associated with them?
What is an electric and a magnetic field?
200
it rotates when energized with an electric current and has many loops of wire wound around an iron cylinder.
What is an armature?
200
The value of the deflecting force when a charge particle moves parallel to magnetic field lines.
What is zero?
300
Magnetism and electricity were regarded as such until it was noticed that an electric current will cause the deflection of a compass needle.
What are unrelated phenomena?
300
When this happens, magnetic domains become jostled out of alignment in a magnet.
What is a heated or dropped magnet?
300
The spinning of these particles in the same direction make stronger magnets.
What are electrons?
300
Parts of a wire in a galvanometer that connect with the stationary contacts.
What are the brushes?
300
Deflected by Earth's magnetic field.
What is cosmic radiation?
400
Direction of a magnetic field outside a magnet.
What is from the north to the south pole?
400
Size of the magnetic domains in an atom.
What are microscopic?
400
Direction of the deflecting force to both the magnetic field lines and the velocity of the charged particle?
What is perpendicular?
400
A calibrated galvanometer to measure electric current (amperes).
What is an ammeter?
400
Just as a current-carrying wire will deflect a magnetic compass. This device will deflect a current- carrying wire.
What is a magnet?
500
The only elements that are magnetic in nature.
What are iron, nickel, and cobalt.
500
All magnetic domains are perfectly aligned in this.
What is a strong magnetized piece of iron?
500
Direction of current in the wire when the deflecting force acts in opposite direction.
What is reversed?
500
A device in which the current changes direction every time the coil makes half a revolution.
What is an electric motor?
500
They are not deflected when moving parallel to the magnetic field lines.
What are moving electric charges?
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