Summary OCR A level Physics A 6.3 Electromagnetism
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Course
Module 6: Particles and Medical Physics
Institution
OCR
Summary notes on topic 6.3 Electromagnetism covering magnetic fields, current carrying conductors, right hand grip rule, Flemming’s left hand rule, electromagnetic induction, magnetic flux density, magnetic flux linkage, charged particles in magnetic fields, velocity selector, Faraday’s law, Le...
Magnetic field lines map magnetic field patterns around magnets and
current conductors
carrying
-
.
•
Arrow / direction of magnetic field is the direction in which a free north
pole would move ( north to south
Equally spaced parallel magnetic field lines represent a uniform magnetic
•
field magnetic flux density is the same throughout the field
-
•
The magnetic field strength is stronger when the magnetic field lines are
closer
together .
Like
poles repel and
opposite poles attract
• .
Current carrying -
conductors
for a current -
carrying wire .
the magnetic field lines are circular centred
,
on the
wire and perpendicular to it .
Direction of magnetic field determined the hand NK where
can be
using right grip
-
the thumb conventional current and the
points in the direction of fingers curve in the
direction of the magnetic field
✓ ✓ ✓ ^ ✓ ✓ ~
• n r n ^
n
og
out of paper into paper
the strength of a
magnetic field is known as
magnetic flux density and
is measured in tesla ( ) t .
When current conductor is placed perpendicular to external
a
carrying an
-
magnetic field ,
the direction of the force can be found using Flemming 's
left -
hand rule .
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