| A | B |
|---|
| step up transformer | increases the voltage |
| step down transformer | decreases the voltage |
| more turns in the secondary | step up transformers more or less turns |
| less turns in the secondary | step down transformers more or less turns |
| How does a transformer work? Mutual inductance is: | the change in magnetic flux caused by the current in the primary coils creates a change in magnetic flux in the secondary coils (more turns more change and more voltage) |
| generator | It converts mechanical energy into electrical energy. The moving loop of wire induces a current in the wire. |
| motor | It converts electrical energy into mechanical energy. It takes current which drive a mechanical device. |
| Lenz's law | The direction of the induced current is such that the magnetic field resulting form the induced current opposes the cahnge in flux that cuased the induced current (electromagnetic induction). |
| Thompson | Determined the charge to mass ratio of the electron. |
| Micheal Faraday & Joesph Henry | Discovered that if a wire moves through a magnetic filed, an electric current is induced in the wire. |
| Millikan | Discovered the charge on the electron with his famous oil drop experiment. |
| Unit of inductance | Henry |
