Equations Flashcards
Calculating Intensity:
Intensity= 1/distance^2
Coulomb’s Law: State K as well
F=K(q1q2)/d^2
k=9x10^9
Calculate Effective RMS
Effective RMS=Peak/1.414
What are the 3 units used in ohms law and what is the equation?
V, I, and R
V
——–
i I R
List all the equations for a series circuit:
RT=R1+R2+R3
IT=I1=I2=I3
VT=V1+V2+V3
List all the equations for a parallel circuit
IT=I1+I2
VT=V1=V2
RT=1/r1+1/r2
What is the equation for power when there is no resistance?
P
———–
i I V
What are the equations for power when there is resistance?
P=I^2 (R)
P=V^2/R
What is the equation for the ratio of induced Voltages?
Vp/np=Vs/ns
n=number of turns
s=secondary wire
p=primary wire
What is the equation for generator rating?
kW=mA/10
or
kW=kVp x mA/1000
How do you find heat unit capacity?
HU=mAs x kVp
How do you find Heat Units/Second
mA x kVp
Calculate Magnification factor and SOD
MF=SID/SOD
SOD=SID-OID