Electromagnetism Flashcards
Explain the force in the motor effect
The force is always at a right angle
Is largest when the field and current directions are at right angles to each other
What does Flemings left hand rule give
Thumb shows the direction of the thrust
First finger shows the direction of the magnetic field
Second finger shows the direction of the current
Describe what directions a meter will give when a metal wire is pushed upwards and downwards in a magnetic field
Downwards = right
Upwards = left
What are the results of the electromagnetic induction experiment
Current is induced in the wire when moved through the magnetic field
How to increase the strength of output voltage in a generator
Add more coils
Spin faster
Strengthen the magnetic field
What is the equations for transformers
Secondary coil / primary coil = secondary voltage / primary voltage
