Magnetism Flashcards
1
Q
Direction of Magnetic Field
A
Direction of force on a north pole if placed in the field.
2
Q
Magnetic Fields are produced by…
A
Electric currents flowing through conductors (electromagnets) and permanent magnets.
3
Q
Magnetic Field of Earth
A
Caused by by electric currents inside the molten iron core of the Earth.
4
Q
Solenoid
A
Long cylindrical coil that behaves like a bar-magnet. When current flows through the wire the magnetic field inside the solenoid is uniform.
5
Q
Magnetic Field Strength (or Flux Density)
A
The force acting per unit current in the wire of unit length when the wire is perpendicular to the magnetic field lines (given in T)
6
Q
One Ampere
A
The current in two infinitely long straight wires 1m apart in a vacuum which produces a force of 2x10^-7 N/m on each wire.
