P4.1.2 - Currents And Fields Flashcards
1
Q
If the current is coming towards you then which way do the fields go?
A
Anti-clockwise
2
Q
What does magnetic flux density depend on?
A
The magnitude of a current, bigger current = a stronger field
The distance from the wire, nearer the wire = a stronger field
3
Q
What is the strength of a magnetic field measured in?
A
Tesla’s (T)
4
Q
How big is the magnetic field of a very strong permenant near its poles?
A
1T
5
Q
What is a solenoid/coil?
A
Many parallel loops of wire
6
Q
Which is stronger electromagnets or permanent magnets?
A
Electromagnets
