(B) -Indicate whether the following statements are true or false and correct the false statements 1-The value of flux involved in the e.m.f equation of a transformer is r.m.s value 22- Distribution transformers are generally designed for maximum efficiency around 85% to 95% of full load 3- The sparking at the brushes in a de machine is due to friction losses. x4- The power is transferred by induction only in autotransformers 5- The speed of d.c series motor is decreased if the armature current is increased
(B) -Indicate whether the following statements are true or false and correct the false statements 1-The value of flux involved in the e.m.f equation of a transformer is r.m.s value 22- Distribution transformers are generally designed for maximum efficiency around 85% to 95% of full load 3- The sparking at the brushes in a de machine is due to friction losses. x4- The power is transferred by induction only in autotransformers 5- The speed of d.c series motor is decreased if the armature current is increased
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.28MCQ
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Three-Phase Transformers
Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.
Transformer
Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.
Question
![(B) -Indicate whether the following statements are true or false and correct the false
statements
1-The value of flux involved in the e.m.f equation of a transformer is r.m.s value
2- Distribution transformers are generally designed for maximum efficiency around
85% to 95% of full load
3- The sparking at the brushes in a de machine is due to friction losses.
x4- The power is transferred by induction only in autotransformers
5- The speed of d.c series motor is decreased if the armature current is increased
20](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe73f09e3-2008-469c-bf14-57f3eeaa1467%2Fa579bf1e-8504-4cee-9fca-6bbd58354897%2Fqz9u8l4_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(B) -Indicate whether the following statements are true or false and correct the false
statements
1-The value of flux involved in the e.m.f equation of a transformer is r.m.s value
2- Distribution transformers are generally designed for maximum efficiency around
85% to 95% of full load
3- The sparking at the brushes in a de machine is due to friction losses.
x4- The power is transferred by induction only in autotransformers
5- The speed of d.c series motor is decreased if the armature current is increased
20
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