motors and loudspeakers Flashcards
1
Q
how are motors affeted by the motor effect
A
BOTH SIDES OF A COIL EXPERIENCE A FORCE IN OPPOSITE DIRECTIONS. AND IT TURNS.
2
Q
how does the loudspeaker use the motor effect
A
a current is sent from a source e.g. phone - this causes the COIL & SPEAKER CONE to VIBRATE, producing sound waves.
3
Q
how to increase speed or motors
A
Add more turns to coil
Increase p.d./current
Use stronger magnet
4
Q
what is a split ring commutator
A
is need to ensure that the current is reversed every half turn, in order to keep the coil spinning.
