using the motor effect. Flashcards
1
Q
where does the current in the coil flow and what it create/ cause?
A
opposite directions. force on each side in opposite directions cause turning affect armature rotates.
2
Q
how could you make the rotor turn quicker?
A
increase strength of magnetic field.
increase current.
more turns in coil.
3
Q
what does the split ring commutator do and what does it ensure?
A
reverses current round coil every half turn.
coil is always pushed in the same direction.
4
Q
how does a moving coil loudspeaker work?
A
electrical signal applied to coil.
produces changing magnetic field around coil.
interacts with permanent magnets magnetic field.
produces force acts on cone making it move.