Electric Motors Flashcards
1
Q
What rule do you use to find the direction of the force?
A
Left-hand rule
2
Q
In the left-hand rule, what does your first finger symbolise?
A
The direction of the magnetic field
3
Q
In the left-hand rule, what does your second finger symbolise?
A
The direction of the current
4
Q
In the left-hand rule, what does your thumb symbolise?
A
The direction of the force ( Motion )
5
Q
How can you increase the speed of a motor?
A
increase the current, adding more turns to the coil or increasing the magnetic flux density
6
Q
How can the direction of a motor be reversed?
A
swapping the polarity of the dc supply or swapping the magnetic poles
