P4.5.5 - The D.C. Motor Flashcards
1
Q
What can the motor effect be used to create? [1]
A
a simple D.C. electric motor
2
Q
What does a simple D.C. motor consist of? [3]
A
- a coil of wire between the poles of the magnet
- a split-ring communtator
- brushes connected to a source of D.C.
3
Q
What does the force on the CCC cause the simple D.C. motor to do? [1]
A
causes it to rotate in a single direction
4
Q
What happens as current flows through the coil? [2]
A
- it produces a magnetic field
- which interacts with the external magnetic field
5
Q
How is a turning effect caused? [1]
A
by forces acting in opposite directions on each side of the coil
6
Q
If theere’s a greater force on the coil, what happens to the turning effect? [2]
A
- the greater the turning point
- the faster it’ll turn
7
Q
How is the turning effect increased? [3]
A
- by increasing the number of turns on the coil
- increasing the current in the coil
- increasing the strength of the magnetic field
