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Play with your magnets!
ALL magnets have two poles NORTH seeking pole SOUTH seeking pole
Breaking a magnet produces two magnets! NS NS NNSS
Opposite poles attract and like poles repel
Iron (steel), Cobalt and Nickel
When a magnetic material is close to a magnet, it becomes a magnet itself We say it has induced magnetism N S N S magnet
Hard and Soft Magnetism
Soft Magnetism Pure iron is a soft magnetic material It is easy to magnetise but loses its magnetism easily N S beforeafter Iron nail S N N S Not a magnet N
Hard Magnetism Steel is a hard magnetic material It is harder to magnetise, but keeps its magnetism (it is used to make magnets!) N S beforeafter Steel paper clip N N S Its a magnet! N S SN
Magnetic field I wonder if this is a magnetic field?
Magnetic field Magnets (and electric currents) produce magnetic fields around them. In the magnetic field, another magnet or magnetic material will experience a magnetic force.
Magnetic field lines We can represent the magnetic field around a magnet using field lines.
Magnetic field lines The arrows show the direction a compass needle would point at that point in the field.
Magnetic field lines The closer the field lines are, the stronger the magnetic force felt The arrows show the direction a compass needle would point at that point in the field.
Earths Magnetic Field N S Remember the North of a compass needle points to the geographic north pole (i.e. the geographic North pole is a magnetic south pole!)
Field around a bar magnet
Two bar magnets Strong uniform field
Two bar magnets no field!
Mind-map Mr Porter is now going to put these slides on a loop and youre going to mind-map them!
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Basic Magnetic Properties Magnets are fun to play with.
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Magnetism Chapter 19. Introduction Applications involving magnetism Applications involving magnetism Loudspeakers Meters Electromagnets Recording.
© Boardworks Ltd 2003 Electromagnets Core Describe the pattern of the magnetic field due to currents in straight wires and in solenoids Describe applications.
R Ch 36 Magnetism pg 1 Text Qs pg 575 RQ 1, 2, 4, 5, 7-9,12,13,19.
36 Magnetism A moving electric charge is surrounded by a magnetic field.
Magnetic Forces and Fields Objective: TSW understand and apply the concepts of a magnetic fields and forces by predicting the path of a charged particle.
In a lab where there wasnt much action Two magnets supplied some distraction. So they matched opposite poles And now theyre quite an attraction.
Chapter 8 Electricity, Magnetism and its uses General Properties of Magnets Magnetism: comes from the region in Greece called Magnesia that contained certain.
ConcepTest 20.1a Magnetic Force I 1) out of the page 2) into the page 3) downwards 4) to the right 5) to the left A positive charge enters a uniform magnetic.
10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt.
Magnetic Force Acting on a Current-Carrying Conductor.
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