unit 4 fc Flashcards
How to figure out voltage?
Ohm’s Law
V = IR
voltage = current x resistance
How do you find the charge? include units in answer
charge = current x time
Q = It
Q: coulomb
I: Amp/ampere
t: time (seconds)
How to find energy? include units in answer
Energy = voltage x current x time
E = VIt
energy: joules
voltage: volts
current: amps/ampere
How to find power? include units
power = energy/time
P= VI
P = E/t
energy: joules
time: seconds
How to find induced voltage?
V = Bvl
voltage = magnetic field strength x relative speed x length of the wire
what is faradays law?
voltage is induced whenever a conductor moves across or “cuts” through a magnetic field lines, but not when it moves along it or rests
what is lenz’s law?
the induced current will produce a magnetic filed such that it will oppose the motion of the magnet
