Summary
Summary iGCSE Physics Pearson Edexcel Topic 6 Magnetism and Electromagnetism Complete Notes
iGCSE Physics Pearson Edexcel Topic 6 Magnetism and Electromagnetism Complete Notes
[Show more]
Content preview
IGCSE PHYSICS – TOPIC 6MAGNETISM AND ELECTROMAGNETISM
a) MAGNETISM
• MAGNETS – they have two poles – North and South. Opposite poles
attract (N + S), same poles repel (N + N or S + S) – a magnet attracts
magnetic materials
• MAGNETICALLY SOFT MATERIALS – are easy to magnetise and lose
their magnetism easily (e.g. iron) – good for electromagnets as we
want them to easily gain ad lose their magnetism
• MAGNETICALLY HARD MATERIALS – are hard to magnetise and don’t
lose their magnetism easily (e.g. steel) – good for permanent
magnets as we don’t want them to lose their magnetism easily
• MAGNETIC FIELD LINES – a way of showing the field strength and
direction. The more lines there are, the stronger the strength of the
field. They NEVER CROSS and have an arrow going from NORTH TO
SOUTH:
• MAGNETIC INDUCTION – when a material becomes temporarily
magnetized when it is placed in a magnetic field
• A UNIFORM FIELD – a field what has the same strength and direction
at all points:
36
, PRACTICAL TO INVESTIGATE: the magnetic field line pattern for a permanent bar magnet
and between two bar magnets
Method:
• Place a plotting compass at the corner of the magnet
• Mark the direction that the compass needle points with a SHARP PENCIL
• Put the edge of the compass on the dot and repeat step 2
• Join all the dots and add an arrow from North to South
b) ELECTROMAGNETISM
• When a CURRENT passes through a wire, a MAGNETIC FIELD is
created around the wire
• THE RIGHT HAND RULE – using the right hand rule we can figure out
the direction of the field lines
o THUMB – direction of the current
o FINGERS – direction of the field lines
• An ELECTROMAGNET can be formed by wrapping a COIL OF WIRE
around a SOFT IRON CORE – increase the number of coils to increase
field strength:
• When a wire is looped into a coil and a solenoid (a long coil)
37
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anish24shah. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53022 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now