Choose the correct answer with stating the relationship or reason. 7- The no load current in a transformer lags behind the applied voltage by an angle of about a) 120 degree d) 180 degree b) 75 degree c) 45 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
Choose the correct answer with stating the relationship or reason. 7- The no load current in a transformer lags behind the applied voltage by an angle of about a) 120 degree d) 180 degree b) 75 degree c) 45 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
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...
Related questions
Question
Choose the correct answer with stating the relationship or reason.
Transcribed Image Text:Choose the correct answer with
stating the relationship or reason.
7- The no load current in a transformer lags behind the applied voltage by an angle of about
a) 120 degree
d) 180 degree
b) 75 degree
c) 45 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
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 4 images
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,