The Simple Electric Motor Flashcards
1
Q
Pg 171. Why does the spindle of wire rotate?
A
The coil is on a spindle therefore the forces act one up and one down = rotation
2
Q
What is a split-ring commutator? Used for?
A
A cleaver way of swapping the contacts every half turn to keep the motor rotating in thee same direction
MUST LEARN THIS DEFINITION
3
Q
How can the direction of the motor be reversed?
A
Swapping the polarity of the direct current (DC) supply
Swapping the magnetic poles
4
Q
What speeds up the motor?
A
`1) More CURRENT
2) Stronger magnetic field
5
Q
What are electric motors used for?
A
CD players, Food mixers, Printers, fan heaters, fans, drills, hair dryers, cement mixers etc.
6
Q
How are electric motors used?
A
1) Link the coil to an axle and add whatever you want to the axle eg, a fan
