Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each...

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Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each other.

Transcript of Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each...

Page 1: Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each other.

Magnets

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Two poles of the opposite kind attract each other.

Two poles of the same kind repel each other.

Page 2: Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each other.

Field lines

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In the early 1800’s, Michael Faraday notes that iron filings line up around a magnet to show “force field lines”.

The lines show the direction of force on a north pole.

Page 3: Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each other.

Electromagnets

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In 1820 Hans Christien Ørsted discovers that an electric current in a wire creates a magnetic field. This is the principle behind the electromagnet.

Page 4: Magnets 1 Two poles of the opposite kind attract each other. Two poles of the same kind repel each other.

Lorentz force

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In 1892 Hendrick Lorentz discovers that a current-carrying wire feels a force when it is in a magnetic field. This is the principle behind the electric motor.

The force on the current is perpendicular to the magnetic field and perpendicular to the current. (If the current is in the same direction as the field, there is no force.)

The force on the electrons is out of the page.

Why did it take him so long???


What happens to magnets when like poles are placed together? They repel.

What happens to magnets when like poles are placed together? They repel.

Lecture 8: Magnets and Magnetism - Montana State University...Magnets •Laws of magnetic attraction and repulsion –Like magnetic poles repel each other –Unlike magnetic poles

Lecture 8: Magnets and Magnetism - Montana State University...Magnets •Laws of magnetic attraction and repulsion –Like magnetic poles repel each other –Unlike magnetic poles

Chapter 22 Magnetism. Permanent bar magnets have opposite poles on each end, called north and south. Like poles repel; opposites attract. If a magnet.

Chapter 22 Magnetism. Permanent bar magnets have opposite poles on each end, called north and south. Like poles repel; opposites attract. If a magnet.

Magnetism. Property of Magnets We say that unlike poles attract, and like poles repel.

Magnetism. Property of Magnets We say that unlike poles attract, and like poles repel.

Refresher Basic concept Like poles will repel Unlike poles will attract.

Refresher Basic concept Like poles will repel Unlike poles will attract.

bullock8a.weebly.com · Web viewBoth E-mags’ and bar magnets’ magnetic fields are strongest at the poles. Both E-mags’ and bar magnets’ opposite poles repel each other Both

bullock8a.weebly.com · Web viewBoth E-mags’ and bar magnets’ magnetic fields are strongest at the poles. Both E-mags’ and bar magnets’ opposite poles repel each other Both

Magnetism (3, Review). Like poles repel Unlike poles attract.

Magnetism (3, Review). Like poles repel Unlike poles attract.

•Here’s the circuit for the flashing neon bulb. What is ... · PDF file• Moving charges and magnetism ... •Like poles repel, unlike poles attract ... We use the right handed

•Here’s the circuit for the flashing neon bulb. What is ... · PDF file• Moving charges and magnetism ... •Like poles repel, unlike poles attract ... We use the right handed

Chapter 19 Magnetism. Magnets Poles of a magnet are the ends where objects are most strongly attracted Two poles, called north and south Like poles repel.

Chapter 19 Magnetism. Magnets Poles of a magnet are the ends where objects are most strongly attracted Two poles, called north and south Like poles repel.

A permanent magnet has a north magnetic pole and a south magnetic pole. Like poles repel; unlike poles attract.

A permanent magnet has a north magnetic pole and a south magnetic pole. Like poles repel; unlike poles attract.

Chapter 20 Magnetism. Magnets Poles of a magnet are the ends where objects are most strongly attracted –Two poles, called north and south Like poles repel.

Chapter 20 Magnetism. Magnets Poles of a magnet are the ends where objects are most strongly attracted –Two poles, called north and south Like poles repel.

Electromagnetism...Polarity of bar magnets ( they have two poles : like poles repel, opposite poles attract each other. Magnetic field (How to detect a magnetic field - experiments

Electromagnetism...Polarity of bar magnets ( they have two poles : like poles repel, opposite poles attract each other. Magnetic field (How to detect a magnetic field - experiments

Magnets have 2 poles (north and south) Like poles repel Unlike poles attract Magnets create a MAGNETIC FIELD around them.

Magnets have 2 poles (north and south) Like poles repel Unlike poles attract Magnets create a MAGNETIC FIELD around them.

Magnetism The shadow of electricity. Magnetic Force Magnets apply forces to each other. Opposite poles attract, like poles repel.

Magnetism The shadow of electricity. Magnetic Force Magnets apply forces to each other. Opposite poles attract, like poles repel.

Lecture 7: Magnets and Magnetism - Montana State University · • Laws of magnetic attraction and repulsion – Like magnetic poles repel each other – Unlike magnetic poles attract

Lecture 7: Magnets and Magnetism - Montana State University · • Laws of magnetic attraction and repulsion – Like magnetic poles repel each other – Unlike magnetic poles attract

MAGNETISM SPH3U. Permanent Magnets A permanent magnet has two poles: North and South. Like poles repel. Unlike poles attract. These repulsive or attractive.

MAGNETISM SPH3U. Permanent Magnets A permanent magnet has two poles: North and South. Like poles repel. Unlike poles attract. These repulsive or attractive.

Chapter 16 Magnetism. Magnets Poles of a magnet are the ends where objects are most strongly attracted Two poles, called north and south Like poles repel.

Chapter 16 Magnetism. Magnets Poles of a magnet are the ends where objects are most strongly attracted Two poles, called north and south Like poles repel.

Chapter 20 Magnetism. 20.1 Magnets and Magnetic Fields Magnets have two ends – poles – called north and south. Like poles repel; unlike poles attract.

Chapter 20 Magnetism. 20.1 Magnets and Magnetic Fields Magnets have two ends – poles – called north and south. Like poles repel; unlike poles attract.

Unit 6E: Forces in action. Opposite poles attract each other Like poles repel each other Forces in action.

Unit 6E: Forces in action. Opposite poles attract each other Like poles repel each other Forces in action.

Chapter 20 Magnetism. Magnets The ends of a bar magnet are called poles Like poles repel and unlike poles attract Regardless of their shape, all magnets.

Chapter 20 Magnetism. Magnets The ends of a bar magnet are called poles Like poles repel and unlike poles attract Regardless of their shape, all magnets.