magnetism/electromagnetism
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19 Terms
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Iron
\________ is made up of a set of regions called domains.
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compass
A(n) \________ is a magnetic needle that will always point north.
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nickel
A magnet is an object that is able to attract other objects containing iron, comma, \________, cobalt.
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North Pole
Bar magnet: Which has a(n) \________ and a South Pole.
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Horseshoe magnet
\________: Which attracts iron containing objects.
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Iron
\________ is not the only element with properties of similar to magnetite, dot, cobalt, and Nickel can also act like magnets or attracted by magnets.
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Horseshoe magnet
Which attracts iron containing objects
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Bar magnet
Which has a North Pole and a South Pole
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What is a magnet?
is an object that can attract other objects containing iron, cobalt or nickel.
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magnetic field
is the area of space in which the magnetic force of a magnet can act on another magnet.
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Electromagnetism
describes all the phenomena resulting from the interaction between electricity and magnetism.
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How to determine the direction of a magnetic field?
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solenoid
is a cylindrical coil of live wire.
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What are magnetic lines of a solenoid?
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How to determine them?
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What can happen with magnetic solenoid?
The magnetic field of a solenoid can be “switched on” or “switched off” at will, but the magnetic field of a magnet cannot.
The direction of the magnetic field lines of a solenoid can be altered by reversing the current direction, while the magnetic field lines of a magnet cannot be reversed because the poles of the magnet cannot be reversed (unless the polarity of the entire magnet is reversed).
The intensity of the magnetic field of a solenoid can be modified, but the same is not true for a magnet.
The direction of the magnetic field lines of a solenoid can be altered by reversing the current direction, while the magnetic field lines of a magnet cannot be reversed because the poles of the magnet cannot be reversed (unless the polarity of the entire magnet is reversed).
The intensity of the magnetic field of a solenoid can be modified, but the same is not true for a magnet.
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how can a power of electromagnet be increased?
by increasing the intensity of the electric current flowing through the solenoid
by adding more loops to the solenoid
by using a core with a lower magnetic remanence (whose domains can be aligned more quickly and easily)
by adding more loops to the solenoid
by using a core with a lower magnetic remanence (whose domains can be aligned more quickly and easily)
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ELECTROMAGNETIC INDUCTION
consists in generating an electric current in a conductor by varying a magnetic field around that conductor.
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To generate an electrical field, a magnetic field must be in motion relative to a charge or a conductor. This can be achieved in one of two ways:
by moving a conductor inside a magnetic field
by moving a magnet around a conductor
by moving a magnet around a conductor
Note 
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