Q5) Transformer Analysis [10 Marks]:
An 8:1 transformer is loaded with $40 + j25 \Omega$ on the secondary side and connected to a 480V rms source through a $500 \Omega$ resistance on the primary side, as shown below.
a) Determine the rms voltage phasor $V_2$ [1]
b) Determine the rms current phasor $I_2$ [1]
c) Determine the rms current phasor $I_1$ [1]
d) Determine the input impedance $Z_i$ seen from the primary side [1]
e) Determine the power in the load resistance, $R_L$, in watts [1]
f) Determine the power delivered by the source in watts [1]
g) Draw the equivalent circuit referred to the primary side, and the equivalent circuit referred to the secondary side [3]
h) In the figure below, if the source, $V_s$, was removed and a DC ohm meter was connected in its place, what would it measure in ohms? [1]
$V_s = 480\angle0^\circ V (rms)$
$R_s = 500 \Omega$
$R_L = 40 \Omega$
$X_L = 25 \Omega$
