| A | B |
|---|
| Two north or two south poles __________. | repel |
| A north and a south poles __________. | attract |
| Magnetic field lines are ____________ loops. | closed |
| Magnetic field lines run from the ___________ to _____________ end of the magnet. | north to south |
| First right hand rule (current carrying wire) | I = thumb, B = curled fingers |
| Second right hand rule (electromagent) | I = curled fingers, B = thumb pointing from south to north |
| Third right hand rule (Force on wire due to magnetic field) | I = pointer finger, F = Thumb, B = palm of hand or curl of fingers -- (ALL MUST BE AT RIGHT ANGLES TO ONE ANOTHER) |
| FORCE IS PROPORTIONAL TO | Current, length of wire and magnetic field strength |
| galvanometer | measures small changes in current (can be used as an ammeter or voltmeter when combined with resistors) |
| Ammeter needs a galvanometer and ____________________________. | shunt resistor, a resistor hooked up in parallel |
| A voltmeter needs a galvanometer and a __________________. | resistor hooked up in series |
| Unit of magnetic field strength is the | Tesla (N/Am) |
| Electric motor | A coil of wire placed in a magnetic field. When the current flows the coil rotates due to the force on the wire. |
| The force of a magnetic field exerts on a charged particle depends on the __________ and ______________. | velocity and charge of the particle and the strength of the electric field and is in a direction perpedicular to both |
| Magnetic flux | strength and number of lines per unit of area |
| X indicates magnetic field is ____________ the page. | into |
| (.) indicates magnetic field is ___________ the page. | out of |
| Magnetic induction | strength of the magnetic field |
| The earths magnetic field lines run from the ________ magnetic pole to the _____________ magnetic pole | south pole to north pole |
| Temporary magnets | Metals that become polarized when being brought near a magnet. |
| Increasing the number of loops in an electromagent causes the magnetic field strength to _______________. | increase |
