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6- The core loss of a transformer depends upon : a) the frequency and the maximum flux density c) rated current b) Induced Voltage d) rated voltage 7- The no load current in a transformer lags behind the applied voltage by an angle of about

6- The core loss of a transformer depends upon : a) the frequency and the maximum flux density c) rated current b) Induced Voltage d) rated voltage 7- The no load current in a transformer lags behind the applied voltage by an angle of about

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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6- The core loss of a transformer depends upon : a) the frequency and the maximum flux density c) rated current b) Induced Voltage d) rated voltage 7- The no load current in a transformer lags behind the applied voltage by an angle of about a) 120 degree b) 75 degree c) 45 degree d)180 degree 8- The hysteresis loss in a transformer is 500 watts at 50 Hz. Its loss at 80 Hz will be a) 312.5 watts b) 500 watts c) 200 watts 9- Power transformers are designed to have maximum efficiency at d) 800 watts a) nearly full load b) 70% full load c) 50% full load d) no load 10- A transformer operates maximum efficiently at 3/4th full load. Its iron (Pi) and copper loss (Pcu) are related as: a) Pi=1.778 Pcu b) Pi=1.333 Pcu c) Pi=0.75 Pcu d) Pi=0.5625 Peu
Transcribed Image Text:6- The core loss of a transformer depends upon : a) the frequency and the maximum flux density c) rated current b) Induced Voltage d) rated voltage 7- The no load current in a transformer lags behind the applied voltage by an angle of about a) 120 degree b) 75 degree c) 45 degree d)180 degree 8- The hysteresis loss in a transformer is 500 watts at 50 Hz. Its loss at 80 Hz will be a) 312.5 watts b) 500 watts c) 200 watts 9- Power transformers are designed to have maximum efficiency at d) 800 watts a) nearly full load b) 70% full load c) 50% full load d) no load 10- A transformer operates maximum efficiently at 3/4th full load. Its iron (Pi) and copper loss (Pcu) are related as: a) Pi=1.778 Pcu b) Pi=1.333 Pcu c) Pi=0.75 Pcu d) Pi=0.5625 Peu
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