# Shared Flashcard Set

## Details

Physics #2
mcat physics
39
Physics
07/09/2009

Term
 magnetic fields are created by:
Definition
 1. moving charges2. currents in wires3. permanent magnets
Term
 when a charge moves parallel...
Definition
 magnetic force is zero
Term
 the magnetic force on a moving charged particle is always perpendicular to...
Definition
 the velocity and the B field
Term
 a magnetic force does...
Definition
 no work!
Term
 a particle moving perpendicular to a constant B field will
Definition
 have uniform circular motion
Term
 current is in the direction that
Definition
 positive charges would flow
Term
 diamagnetic material:
Definition
 individual atoms have no net magnetic field
Term
 paramagnetic and ferromagnetic:
Definition
 individual atoms do have a net B field
Term
 B field lines travel
Definition
 N --> S
Term
 current flows from ___ potential to ___ potential
Definition
 higher to lower (analogous to masses)
Term
 current flows from the ____ terminal to the ___ terminal
Definition
 positive to negative
Term
 current is the direction in which ___ charge would flow
Definition
 positive
Term
 current is the opposite to the direction of ___ flow
Definition
 electron
Term
 emfs are ____
Definition
 potential differences
Term
 greater resistance with...
Definition
 1. longer, thinner, higher temps
Term
 kirchhoff's laws
Definition
 at any junction the sum of currents in will equal the sum of currents out --- conservation of electric charge
Term
 each additional resistor added in parallel acts to decrease the total resistance and therefore...
Definition
 increase the current
Term
 parallel resistors experience _____ voltage drop
Definition
 the same
Term
 each additional resistor added in series increases the total resistance and therefore...
Definition
 decreases the total current
Term
 energy is ____ in one complete loop of a circuit
Definition
 conserved!
Term
 each capacitor added in parallel acts to____ the total capacitance
Definition
 increase
Term
 voltage across each parallel capacitor is
Definition
 the same
Term
 each capacitor added in series acts to___ total capacitance
Definition
 decrease
Term
 the total voltage drop across a series of capacitors is the sum of
Definition
 the voltage drops across each separately
Term
 larger spring constant k means
Definition
 stronger, stiffer spring
Term
 equilibrium point of SHM is the point where
Definition
 the net force is zro
Term
 is SHM the frequency and period are
Definition
 independent of the amplitude
Term
 SHM: PE is zero at
Definition
 the equilibrium point
Term
 SHM: KE is a max at
Definition
 the equilibrium point
Term
 SHM: PE is a maximum at
Definition
 the point of maximum displacement
Term
 SHM: KE is zero at
Definition
 the point of maximum displacement
Term
 SHM: maximum acceleration occurs at
Definition
 maximum displacement
Term
 transverse waves:
Definition
 particles oscillate perpendicular to direction of wave motion
Term
 longitudinal waves
Definition
 particles oscillate aLONG the direction of the wave motion
Term
 destructive interference occurs when waves are
Definition
 180 degrees out of phase
Term
 nodes:
Definition
 points in the wave that remain at rest
Term
 antinodes:
Definition
 points that fluctuate with the maximum amplitude
Term
 sound propagates through
Definition
 solid, liquid, and gas---but NOT through a vacuum
Term
 higher harmonics have ___ wavelengths and ___ frequencies
Definition
 shorter, higher
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