Admittance: Admittance is the reciprocal of impedance. It is denoted by the letter ‘Y’ and the unit of measurement is mho.
Y = I/E = RMS current / RMS voltage.
Equation used in admittance
a. Conductance ‘G’ = Y * cosϕ = 1/Z *R/Z = R/Z2 mho.
b. Susceptance ‘B’ = Y * sinϕ = 1/Z * X/Z = X/Z2 mho.
c. Admittance ‘Y’ = √G2 + B2 mho.
d. In special cases when X = zero, then G = 1/R and R = zero, then B = 1/X.
