The DC Motor
- The motor effect can be used to create a simple d.c. electric motor
- The force on a current-carrying coil is used to make it rotate in a single direction
- The simple d.c. motor consists of a coil of wire (which is free to rotate) positioned in a uniform magnetic field
A Simple D.C. Motor
In a simple d.c. motor, a coil placed in a magnetic field may experience a turning effect
- As current flows through the coil, it produces a magnetic field which interacts with the external magnetic field
- Forces act in opposite directions on each side of the coil, causing a turning effect
- The greater the turning effect on the coil, the faster it will turn
- The turning effect is increased by increasing:
- The number of turns on the coil
- The current in the coil
- The strength of the magnetic field