IAN LANG ELECTRONICS

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OHM

 

V=IR     I=V/R     R=V/I

 

W=AV   A=W/V    V=W/A

 

RMS = PEAK (0.707)

 

 

PEAK =RMS (1.414)

POWER FACTOR

 

pf =TRUE POWER/APPARENT POWER

 

pf = COSINE OF PHASE ANGLE

Reactance

 

Xc = 1 / (2   (fC))     f in hertz and C in farads

X  = 2     fL                 f in hertz and L in Henries

 

measured in Ohms

L

 

Impedance

 

Zt  =         R  + (X  - Xc)

L

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Pi Squared........

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The inverse square law calculates theoretically how much intensity  of power in a radio wave will be present at a given distance from a source.

 

The equation is:    Intensity = P / 4 pi r

 

 

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