P4.1 Flashcards
Which way do magnetic field lines travel?
N to S
What 3 metals are magnetic?
Cobalt, Iron, Nickel
How do magnetic field lines show strength?
The closer the field lines, the stronger it is
What is an induced magnet?
A magnet that only has lined up domains (so is magnetic) near a permanent magnet
Which way do compasses point towards?
Magnetic North, Geographic South
Which way does the North pole of a magnet point towards?
Magnetic north
What is the Earth’s magnetic field similar to?
A bar magnet
What js the unit of strength of a magnetic field?
Teslas (T)
What does the strength of a magnetic field around a wire depend on?
The magnitude of the current
The distance from the wire
What is the right hand corkscrew rule
Put your thumb in the direction of current
Wrap your fingers around the wire
The direction they point is the direction of current
What is a solenoid
A coil of wire which can create a strong magnetic field
How can you make solenoids stronger?
By adding more loops of wire
By using a magnetic material core
If the wire current is a dot, what direction is current?
Anticlockwise
If it is a cross, it is clockwise
What is the Domain theory?
The idea that all materials have magnetic domains inside,and when they are lined up creates a magnetic field
