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Question 4: What happens if the speed of a DC shunt generator is lower than critical speed during no- load operation? A) The generator will produce excessive voltage B) The generator will not produce any voltage C) The generator will produce unstable voltage A)- Indicate whether the following statements are true or false and correct the false statements 1-The efficiency of a transformer at load 0.8 p.f. Lag is more than at load 0.8 p.f. Lead 2- No load current in a transformer lags behind the voltage by about 15° 3- There is no output from the transformer under short-circuit conditions 4-. The full-load copper loss and iron loss of transformer are 800w and 600w respectively, the copper loss and iron loss at half load will be 400w and 300w respectively 5- The imaginary component of no load current for transformer is responsible for the consumption of iron loss

Question 4: What happens if the speed of a DC shunt generator is lower than critical speed during no- load operation? A) The generator will produce excessive voltage B) The generator will not produce any voltage C) The generator will produce unstable voltage A)- Indicate whether the following statements are true or false and correct the false statements 1-The efficiency of a transformer at load 0.8 p.f. Lag is more than at load 0.8 p.f. Lead 2- No load current in a transformer lags behind the voltage by about 15° 3- There is no output from the transformer under short-circuit conditions 4-. The full-load copper loss and iron loss of transformer are 800w and 600w respectively, the copper loss and iron loss at half load will be 400w and 300w respectively 5- The imaginary component of no load current for transformer is responsible for the consumption of iron loss

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Question 4: What happens if the speed of a DC shunt generator is lower than critical speed during no- load operation? A) The generator will produce excessive voltage B) The generator will not produce any voltage C) The generator will produce unstable voltage A)- Indicate whether the following statements are true or false and correct the false statements 1-The efficiency of a transformer at load 0.8 p.f. Lag is more than at load 0.8 p.f. Lead 2- No load current in a transformer lags behind the voltage by about 15° 3- There is no output from the transformer under short-circuit conditions 4-. The full-load copper loss and iron loss of transformer are 800w and 600w respectively, the copper loss and iron loss at half load will be 400w and 300w respectively 5- The imaginary component of no load current for transformer is responsible for the consumption of iron loss
Transcribed Image Text:Question 4: What happens if the speed of a DC shunt generator is lower than critical speed during no- load operation? A) The generator will produce excessive voltage B) The generator will not produce any voltage C) The generator will produce unstable voltage A)- Indicate whether the following statements are true or false and correct the false statements 1-The efficiency of a transformer at load 0.8 p.f. Lag is more than at load 0.8 p.f. Lead 2- No load current in a transformer lags behind the voltage by about 15° 3- There is no output from the transformer under short-circuit conditions 4-. The full-load copper loss and iron loss of transformer are 800w and 600w respectively, the copper loss and iron loss at half load will be 400w and 300w respectively 5- The imaginary component of no load current for transformer is responsible for the consumption of iron loss
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