electromag Flashcards
explain how the current produces movement if the coil
- current in coil
- creates mag field
- interaction of this field with perm mag
- force on wire (of coil)
- Force up on one side and down on the other side
- commentator reverse is current every half term
how is electromagnetic in duction using alternators to generate alternating current
- no coil of wire rotates in magnetic field
- end of coil is connected to slip rings which will cost current to change direction while rotating
what factors affect the size of an induced voltage
The number of turns on the coil of wire
how strong the MF is
how fast you move the magnet
two changes I would reverse direction of force
- direction of mag field
- direction of current
explain where the ammeter displays a small current when the wires moved between magnet
- wire cuts magnetic field lines
- voltages induced
State two change that would make the motor spin faster
- increase current
- stronger magnet
- more turns on coil
the magnet is released and falls into the coil explain why the voltmeter shows a reading
- there is voltage
- because there is field lines which are cut
which induces a voltage
suggest had to make the coil spin in opposite directions
reverse current
cell connections
magnets field/poles
