6.2 How strong are magnetic fields? Flashcards
1
Q
Describe what happens when a current carrying wire is placed at right angles to a uniform magnetic field
A
The magnetic fields interact which results in a force F on the wire
2
Q
What is the relationship between force and current
A
Force is proportional to current x length
3
Q
Define magnetic flux density
A
The strength of the field
4
Q
What are the equations for force in a magnetic field including current
A
F = BIL Force = magnetic flux density x current x length F = BILsin theta
5
Q
For the equation F = BILsin theta, what does theta represent
A
The angle between B and the wire
6
Q
What do the fingers in the left hand rule for magnetic fields represent
A
Thumb = force
First finger = field
Second finger = current
