Transcript Do now! - MrSimonPorter

Today’s lesson
The
MOTOR
EFFECT
Can you gather
around Mr
Porter?
The Motor Effect
When a current is placed in a magnetic
field it will experience a force (provided the
current is not parallel to the field). This is
called the motor effect.
Can you
copy this
sentence
into your
books
please.
The Motor Effect
The direction of the force on a current in a
magnetic field is given by Flemming’s left
hand rule.
Thumb = Motion
First finger = Field direction
(N to S)
Centre finger = Conventional Current
(+ to -)
The Motor Effect
Can you copy
this please?
WITH
DIAGRAM!
The direction of the force on a current in a
magnetic field is given by Flemming’s left
hand rule.
Thumb = Motion
First finger = Field direction
(N to S)
Centre finger = Conventional Current
(+ to -)
Sample question 1
In this example, which way will the wire be
pushed? (red is north on the magnets)
Sample question 2
In this example, which way will the wire be
pushed? (red is north on the magnets)
Current
Field
Sample question 3
Can you gather
around Mr
Porter?
Again?!
Building an electric motor
Can you gather
around Mr Porter
at the back of
the class?
Again?!
Building a loudspeaker
These also use the motor effect
Coil in here
magnet
Let’s read!
Read pages 210 and 211. Then
answer the questions on p211.
Finish for homework