P4.2.1 - Currents and forces Flashcards
1
Q
What is the motor effect?
A
When 2 magnets exert forces upon each other
2
Q
How do calculate the size of the force exerted in a magnetic field?
A
force on conductor = current x length of conductor x magnetic flux density
3
Q
How do you calculate the direction of the force on the wire.
A
Fleming’s Left Hand Rule
4
Q
2 parallel wires carry current. Suggest why there is a force on each wire?
A
When a current goes through a wire, a magnetic field is generated around it. The 2 fields both interact and they experience a force. The force is repulsive as they flow in the same direction
