Question 1 of 10
What is the theoretical efficiency of an ideal transformer?
An ideal transformer is defined as having zero energy losses, thus achieving 100% efficiency.
Question 2 of 10
Which of the following is a primary source of loss in transformer windings?
Copper losses are caused by the resistance of the windings and the current flowing through them.
Question 3 of 10
What type of losses are caused by magnetic field reversals in the core?
Hysteresis losses are a result of the energy required to repeatedly magnetize and demagnetize the core material.
Question 4 of 10
What causes eddy current losses in a transformer core?
Eddy currents are circulating currents induced in the core material by the changing magnetic flux, leading to heat generation.
Question 5 of 10
Which loss is associated with leakage flux inducing currents in nearby conductive materials?
Stray losses are due to the leakage flux inducing eddy currents in nearby conductive parts of the transformer like the tank or clamping structures.
Question 6 of 10
Which type of loss occurs in the insulation materials of a transformer?
Dielectric loss is due to the heating of the insulation material as a result of the electric field applied.
Question 7 of 10
What causes magnetostriction losses in a transformer?
Magnetostriction is the physical expansion and contraction of the core material due to the changing magnetic field.
Question 8 of 10
What type of losses are also associated with the buzzing sound sometimes heard from transformers?
The buzzing sound is caused by mechanical vibrations and magnetostriction.
Question 9 of 10
Which statement is generally true about the efficiency of larger transformers?
Larger transformers generally have higher efficiencies due to reduced losses relative to their power handling capacity.
Question 10 of 10
What is the efficiency range for distribution transformers?
Distribution transformers typically operate at efficiencies above 98%.
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