A transformer is used to lower the electrical supply voltage of 240V to supply power to a light bulb with rated power of 12V, 2A. If the current in the primary coil is 0.15 A, what is the efficiency of the transformer?

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
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Chapter15: Alternating-current Circuits
Section: Chapter Questions
Problem 15.9CYU: Check Your Understanding A transformer steps the line voltage down from 110 to 9.0 V so that a...
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What is the efficiency of the transformer?

A transformer is used to lower
the electrical supply voltage of
240V to supply power to a
light bulb with rated power of
12V, 2A. If the current in the
primary coil is 0.15 A, what is
the efficiency of the
transformer?
Transcribed Image Text:A transformer is used to lower the electrical supply voltage of 240V to supply power to a light bulb with rated power of 12V, 2A. If the current in the primary coil is 0.15 A, what is the efficiency of the transformer?
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