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Question

abbCel Colorful... Intense Q... Subtle Em daBico Emphasis Heading 1 1 NormalStrong Subitle Ttle Styles 10) A power transformer has a single primary winding and three secondary writings. Which winding will have the highest measured resistance? a) The 120V primary b) The 5.0V secondary c) The 6.3V secondary d) The 400V secondary See BB Notes 11)A (n)transformer has equal primary and secondary voltages and is used to electrically separate the source from the load. 10 a) Isolation b) Wall c) Step-up See BB Notes 12) loss is power loss in a transformer caused by the resistance of the copper conductors used to make the windings. a) Energy b) Flux c) Current d) Resistive See BB Notes 13) loss is power loss in a transformer or motor due to currents induced in the metal field structure from the changing magnetic field. a) Hysteresis b) Eddy Current c) Flux d) Current See BB Notes

Explanation / Answer

10) In any transformer, the high voltage side has high resistance and low voltage side has lower resistance.

Option d is correct.

11) Isolation transformer has equal primary and secondary voltages used to isolate or electrically separate source from the load.

Option a is correct.

12) Copper loss or current loss or I^2R loss is the loss due to resistance of copper conductor.

Option c is correct.

13) current induced in the metal field structure is called Eddy current. Loss due to this current is Eddy curremt loss.

Option b is correct.

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