Home > Flashcards > Print Preview
The flashcards below were created by user
allenwhycheng
on FreezingBlue Flashcards. What would you like to do?

unit for voltage
volt (joule/coulomb) or kgm^{2}/As^{3}

formula for electric potential (V) given a (q) at distance (r)
V=kq/r

formula for electric potential energy (U)?
U=qV

unit for magnetic field
 Tesla or Gauss
 1 Tesla =10^{4} Gauss

formula for force on moving charge particle in a magnetic field?
 F=qvBsin()
 B magnetic field

unit of current
Ampere (1 Coulomb/sec)

formula for current (I)
I=q/t

formula for force on a current carrying wire in the presence of a magnetic field
F=iLBsin()

formula for magnetic field created by long straight wire
B=(permeability of free space)(current)/(2pi)(distance from wire)=u_{o}i/2pir

formula for magnetic field at enter of loop or wire
B=u_{o}i/r


formula for electric power
P=iV=i^{2}R=V^{2}/R

formula for R in series circuit
R_{s}=R_{1}+R_{2}+R_{3}...

formula for R in parallel circuit
1/R_{p}=1/R_{1}+1/R_{2}+1/R_{3}

formula for capacitance
C=(charge stored on the plate)Q/(potential difference btwn plates)V

unit for capacitance
Farad (Coulomb/Volt)

formula for electric field btwn the plates of capacitor
 E=potential difference btwn plates/distance of plates
 =V/d

for AC current, formula for I_{rms}, for V_{rms}
I_{rms}=I_{max}/sqrt 2
V_{rms}=V_{max}/sqrt 2

formula for Hooke's law (for springs)
F=spring constant/displacement=kx

formula for angular frequency of a mass on a spring and of a pendulum (simple harmonic motion)?
spring f=sqrt(k/m)
pendulum f=sqrt(g/L)

formula for simple harmonic motion kinetic energy and potential energy
KE=mv ^{2}/2
 U_{spring}=kx^{2}/2
 U_{pendulum}=mgh

for simple harmonic motion, when is kinetic energy greatest, when is potential energy the greatest?
 KE at equilibrium point
 U at max displacement

formula for a period of a mass on as spring and on of a pendulum
 period spring=2pi sqrt(m/k)
 period pendulum=2pi sqrt(L/g)

describe particle oscillation in transverse wave, in longitudinal wave
trans wave oscillate perpendicular to wave
long wave oscillate along the direction of wave

formula for velocity of wave
v=freq*wave length

whats a node and antinode in a wave
 node r points that remains at rest
 antinode r the points at max amptitude

formula for sound intensity
power/area

(t/f)higher harmonics of standing wave in open pipes have higher wave speed than lower harmonics
false, all harmonics have same wave speed

how are focal length and radius of curvature related?
 focal length=radius of curvature/2
 f=r/2

formula for object distance (o), image (distance), and focal length (f)
1/f=1/o+1/i=2/r

