Exam 2 Flashcards
do you need motion to have voltage?
yes
do you need motion to have current?
no
what is flux?
the number of magnetic field lines through an area
induced current flows in a direction that _____ change in flux that caused it
opposes
magnetic field algorithm
1) is there a change in flux (is number of lines changing?)
2) is no, no induced emf
3) if yes,
more or less dots through an area, or more or less x’s through an area?
4) oppose the change
add dots (CCW)
add x’s (CW)
generators have an electrical _____ and mechanical _____
output
input
motors have an electrical _____ and mechanical _____
input
output
inductors can be changed by _____ and _____
geometry and composition
capacitors store _____ energy
inductors store _____ energy
electrical
magnetic
more turns = _____ voltage
higher
are resistors dependent on frequency?
no
do resistors use power?
yes
do inductors depend on frequency?
yes
is there more current or voltage in an inductor?
voltage leads current
do inductors use power?
no
do capacitors depend on frequency?
yes
is there more voltage or current in capacitors?
voltage lags current
do capacitors use power?
no
low frequency = _____ resistance
high
low resistance = _____ frequency
high
low resistance = _____ current
high
high resistance = _____ current
low
in an RL circuit, does light shin more at higher or lower frequency?
lower
capacitor shape
parallel lines
