In a load test on transformer the no load voltage is 240V. The terminal voltage drop is 225V on resistive load condition. The primary voltage of transformer is 350V. The primary and secondary currents are 0.45A and 0.671A. What is the efficiency of the transformer? O a. 68% O b. 95.85% O C. 64% O d. 43.19%

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter27: Single-phase Transformers
Section: Chapter Questions
Problem 4RQ: All values of a transformer are proportional to its __________________ ___________________.
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In a load test on transformer the no load voltage is 240V. The terminal voltage drop is 225V on resistive load condition. The
primary voltage of transformer is 350V. The primary and secondary currents are 0.45A and 0.671A. What is the efficiency of the
transformer?
O a. 68%
O b. 95.85%
O c. 64%
O d. 43.19%
Transcribed Image Text:In a load test on transformer the no load voltage is 240V. The terminal voltage drop is 225V on resistive load condition. The primary voltage of transformer is 350V. The primary and secondary currents are 0.45A and 0.671A. What is the efficiency of the transformer? O a. 68% O b. 95.85% O c. 64% O d. 43.19%
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