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Play with your magnets!
ALL magnets have two polesNORTH seeking pole SOUTH seeking pole
Breaking a magnet produces two magnets!
Opposite poles attract and like poles repel
Magnetic materials Iron (steel), Cobalt and Nickel
Magnetic induction When a magnetic material is close to a magnet, it becomes a magnet itself We say it has induced magnetism magnet S N N S
Hard and Soft Magnetism
Soft Magnetism Pure iron is a soft magnetic materialIt is easy to magnetise but loses its magnetism easily before after N S S N N S N Not a magnet Iron nail
Hard Magnetism Steel is a hard magnetic materialIt is harder to magnetise, but keeps its magnetism (it is used to make magnets!) before after S N S N N S N N It’s a magnet! S Steel paper clip
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 arrows show the direction a compass needle would point at that point in the field. The closer the field lines are, the stronger the magnetic force felt
Earth’s Magnetic FieldRemember the North of a compass needle points to the geographic north pole (i.e. the geographic North pole is a magnetic south pole!) N S
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 you’re going to mind-map them!
This lesson ac/dc Insulation and double insulationEarthing, fuses and circuit breakers Formative assessment
Reading! Read carefully pages 192-195Answer the questions on both pages Finish for homework due Tuesday 13th January
ELECTRICITY & MAGNETISM
Do now! Do you know the formulae for Wenesday’s Test? D = m/V p = F/A p = ρhg p 1 V 1 = p 2 V 2 (constant temp and fixed mass) p 1 /T 1 = p 1 /T 1 (constant.
Magnetism and Electromagnetism
LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON TO GO BACK, PRESS ESC BUTTON TO END LEFT CLICK OR PRESS SPACE BAR TO ADVANCE, PRESS P BUTTON.
KS4 Physics Electromagnetism.
MAGNETISM. Specification Magnetism and electromagnetism Magnetism understand that magnets repel and attract other magnets and attract magnetic substances.
Unit 11 Magnetism.
Magnets. Two Poles What is a magnet? A magnet is an object that attracts certain materials usually objects made of iron or steel.
In this presentation you will:
Basics in Magnetism Electromagnetism Force on a Current-Carrying Wire EM Induction Transformer Generators Electric Motors ELECTROMAGNETISM.
Magnets & Electricity Vocabulary Magnet Circuits Electricity Grab Bag Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.
Magnetism – From the syllabus state the properties of magnets give an account of induced magnetism distinguish between ferrous and nonferrous materials.
Magnetism Unit Notes 1 Grade 10 ST J. Kelly and A. Sanniti.
Introduction to Magnetism
These poles of a magnet repel. Like poles Poles on a magnet that attract.
Magnetism Magnets and Magnetic Fields Physics Chapter 21 Section 1 Pages
Magnets and Electricity. Magnets A magnet is an object that produces a magnetic field. Magnets can be natural or man made.
Do Now Write a few sentences to describe the characteristics of magnets that you know?
Chapter 8 Magnetism & Its Uses.
ALL magnets have two poles NORTH seeking pole SOUTH seeking pole.
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