5) Next to each statement write T (True) or F (False). (2 points each)
a) —- When ferromagnetic iron material saturates, its relative permeability decreases.
b) —- If the iron core of an inductor becomes heavily saturated, its inductance increases.
c) —- In magnetic equivalent circuits, the mmf is analogous to the “current” in electrical
d) —- In magnetic equivalent circuits, the flux (φ) is analogous to the “voltage” in electrical
e) —- When the frequency of the flux in an iron core increases, eddy current loss increases
f) —- Hysteresis loss of a ferromagnetic material whose hysteresis loop has a smaller area is
larger than that of a ferromagnetic material with a large area hysteresis loop.
g) —- steel laminations reduce eddy current losses because they have very small Ohmic
h) —- Magnetizing inductance of an ideal transformer is zero.
i) —- In the short circuit test, the low voltage winding is shorted and a small voltage is applied
to the high voltage winding.
j) —- In the open-circuit test, the input power to a transformer shows full-load iron losses.