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Tuesday, April 28, 2015

Magnetism Check List

As the AP exam nears, here is a magnetism check list. Check it out - what do you need to review? Am I forgetting anything? There is also an EM Induction check list.

EM Magnetism Check List

-         Where does magnetism come from?
-         What are magnetic monopoles?
-         Do you know which way magnetic fields ‘flow?’
-         Can you draw magnetic field lines for different arrangements of magnets?
-         Can you use RHR and LHR to determine which way charged particles will get pushed?
-         Can you use F = qv x B and F = Il x B?
-         Why do charged particles go into circular paths when in magnetic fields?
-         Are you comfortable with mv2/R = qvBsinθ?
-         What is a mass spectrometer?
-         What is a velocity selector?
-         How do you calculate the mass of particles in mass spectrometers?
-         When do particles move in spiral/helical paths in B-fields?
-         What are magnetic domains?
-         Why do magnets generally get weaker with heat? When striking or dropping the magnet?
-         Can you define Ampere’s law?
-         Can you use Ampere’s law for long wires? Long solenoids? Toroids?
-         What is current density?
-         Can you find B-fields inside wires with a uniform current density?
-         Can you find B-fields inside wires with a non-uniform density?
-         When and how do you use the curly RHR? Remember this is for the relationship between currents and B-fields those currents create – one is linear, the other circulates
-         How do you conceptually prove currents running through parallel wires in the same direction attract, and in opposite directions repel?
-         How do you find the strength of the magnetic force between wires with currents?
-         Can you define the Biot-Savart law?
-         How do you use B-S for wires with ends and for loops of currents?
-         How do you use B-S for moving charged particles?
-         What is Gauss’s law for a magnet (i.e. the total flux through a closed surface)?
-         What are superconducting magnets?
-         How do we make permanent magnets?
-         What creates the earth’s B-field?
-         How are auroras created at the poles?

-         From chemistry, what are ferro-, para- and diamagnetic materials?

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