P7 - MAGNETISM + ELECTROMAGNETISM Flashcards
1
Q
What do PERMANENT MAGNETS produce?
A
ALWAYS produce a magnetic field.
2
Q
What do INDUCED MAGNETS do?
A
Become magnetised when in another magnetic field.
3
Q
OPPOSITE POLES WILL…
A
ATTRACT EACH OTHER
4
Q
LIKE POLES WILL…
A
REPEL EACH OTHER.
5
Q
What is the MOTOR EFFECT?
A
A current-carrying wire in a magnetic field will experience a force as it produces its own magnetic field that interacts with the other.
6
Q
What is the rule to show the direction of current in a wire?
A
RIGHT HAND RULE
7
Q
What is the EQUATION for force? ( MOTOR EFFECT )
A
Force = Magnetic flux density x current x length
8
Q
TO FIND OUT DIRECTION OF THE FORCE…
A
FLEMING’S LEFT HAND RULE.
