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### Kilka wzorow uzywanych w elektrotechnice ###
Zaleznosc ampera od kulomba
1A = 1C/1s
Zaleznosc dzula od wata
1J = 1W/1s
Definicja kulomba:
1C = 6.25*10^18 elektronow
Wzor na moc pozorna pradu przemiennego
S[VA] = U[V]*I[A]
Wzor na moc czynna pradu przemiennego
P[W] = U[V]*I[A]*cos fi
Wzor na cos fi
cos fi = P[W]/S[VA]
Wzor na moc bierna
Q[var] = SQRT(S^2-P^2)
wzor na opor przewodnika
R[ohm] = ro[ohm*m] * l[m]/S[mm^2]
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