level: DC motor
Questions and Answers List
level questions: DC motor
| Question | Answer |
|---|---|
| what is a motor | wire that is spinning |
| left hand rule | here |
| the motor effect summary | 1) wire carrying the current experience a temp magnetic feild 2) temp magnetic field interacts with the permenant magnetic feild of the bar magnets 3) this causes a force causing the wire to turn |
| roles of the brushes | conducts the current between stationary wires and rotating wire of motor |
| role of split ring commmutator | reverses every half turn to ensure motor turns continuosly |
| why does the coil spin when the switch is closed? | 1) a current flows around the circuit 2) this creates a temp magnetic field 3) temp magnetic field interacts with permanent magnetic field of the magnet 4) creates a force which turns the coil |