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electronics math
ohm's law formulas
for DC circuits
ohm's law formulas
for AC circuits
resistance
calculations
sinusoidal
voltages & currents
conductance,
susceptance, & admittance
reactance
formulas
resonant
frequency formulas
impedance
formulas
power factor
"Q" or figure
of merit
transformer
relationships
efficiency
(for any device)
decible formulas
frequency &
wavelength
lengths of
antennas
coupled inductance
trigonometric
formulas
 ohm's law formulas for DC circuits
Power P |
Current I |
Resistance R |
Voltage E |
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ohm's law formulas for AC circuits
series
parallel
resistor calculations
resistors in series
RTOTAL = R1 + R2 + R3 +...
two resistors in parallel
equal resistors in parallel
RTOTAL = R/n , where n is the number of resistors
resistors in parallel general formula
sinusoidal voltages & currents
effective value = 0.707 X peak value
average value = 0.637 X peak value
peak value = 1.414 X effective value
effective value = 1.11 X average value
peak value = 1.57 X average value
average value = 0.9 X effective value
conductance, susceptance, & admittance
reactance formulas
resonant frequency formulas
impedance formulas
power factor
Q or figure of merit
Q = XL /R
or, XC /R
transformer relationships
efficiency (for any device)
decible formulas
frequency & wavelength
length of antennas
Formulas assume velocity of propagation equal to 95% of the velocity of light.
coupled inductance
(M = mutual inductance; K = coefficient of coupling)
trigonometric formulas
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