EBK PHYSICS FOR SCIENTISTS & ENGINEERS
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Chapter 29, Problem 62GP

(a)

To determine

The current through the primary windings of the transformer.

(b)

To determine

The ratio of the number of the primary windings to the secondary windings of the transformer.

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A transformer consist of a primary coil connected to a 120 V source that drive 4 A of current through the primary and a secondary wire that contains 1/3 as many turns as the primary wire.  What is the current in the secondary wire if the transformer is 80% efficient?
A transformer is used to charge a cell phone. The number of turns on the primary coil is 600. The voltage input is 120 V and the output needs to be 9.0 V. The output current is 40 milliamperes. What is the number of turns on the secondary coil and the current in the primary. Assume the transformer is 100% efficient. The number of turns on the secondary coil is 45 and the current in the primary is 533 milliamperes The number of turns on the secondary coil is 8000 and the current in the primary is 533 milliamperes The number of turns on the secondary coil is 45 and the current in the primary is 3.0 milliamperes. The number of turns on the secondary coil is 8000 and the current in the primary is 3.0 milliamperes
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