Note: I need the expert's solution in handwriting with a signature or an equation with a relationship. Q1: Choose the correct answer 1- A single-phase transformer is rated at 220/22 V, 110 VA at 50 Hz, the turn ratio is: (a) 10 (b) 0.1 (c) 2 (d) 0.5 2- The direction of rotation of the de shunt motor can be reversed by (a) Reversing the polarity for both the armature winding and the field winding (b) Reversing the supply voltage connections (c) Reversing the polarity for either the field winding or the armature winding (d) None of these 3- The speed of a de motor can be controlled by varying (a) Its flux per pole (b) Resistance of armature circuit (c) Applied voltage (d) All of the above 4- The efficiency of a transformer is maximum when (a) Constant losses = Iron losses (b) Variable losses = Copper losses (c) Core losses = Copper losses (d) Constant losses = Core Losses 5-The No-load characteristics of a de shunt generator is also called: (a) The performance characteristics (b) The voltage regulation characteristics (c) Total characteristics (d) Magnetizing characteristics 6- The reason for the fall of the terminal voltage due to a load of a de shunt generator: (a) Armature resistance drop (b) Armature reaction drop (c) Reduction in field current (d) All the above
Note: I need the expert's solution in handwriting with a signature or an equation with a relationship. Q1: Choose the correct answer 1- A single-phase transformer is rated at 220/22 V, 110 VA at 50 Hz, the turn ratio is: (a) 10 (b) 0.1 (c) 2 (d) 0.5 2- The direction of rotation of the de shunt motor can be reversed by (a) Reversing the polarity for both the armature winding and the field winding (b) Reversing the supply voltage connections (c) Reversing the polarity for either the field winding or the armature winding (d) None of these 3- The speed of a de motor can be controlled by varying (a) Its flux per pole (b) Resistance of armature circuit (c) Applied voltage (d) All of the above 4- The efficiency of a transformer is maximum when (a) Constant losses = Iron losses (b) Variable losses = Copper losses (c) Core losses = Copper losses (d) Constant losses = Core Losses 5-The No-load characteristics of a de shunt generator is also called: (a) The performance characteristics (b) The voltage regulation characteristics (c) Total characteristics (d) Magnetizing characteristics 6- The reason for the fall of the terminal voltage due to a load of a de shunt generator: (a) Armature resistance drop (b) Armature reaction drop (c) Reduction in field current (d) All the above
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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Note: I need the expert's solution in handwriting with a signature or an equation with a relationship.
Electric machines.
Transcribed Image Text:Note: I need the expert's solution in handwriting with a signature or an equation with
a relationship.
Q1: Choose the correct answer
1- A single-phase transformer is rated at 220/22 V, 110 VA at 50 Hz, the turn ratio is:
(a) 10
(b) 0.1
(c) 2
(d) 0.5
2- The direction of rotation of the de shunt motor can be reversed by
(a) Reversing the polarity for both the armature winding and the field winding
(b) Reversing the supply voltage connections
(c) Reversing the polarity for either the field winding or the armature winding
(d) None of these
3- The speed of a de motor can be controlled by varying
(a) Its flux per pole
(b) Resistance of armature circuit
(c) Applied voltage
(d) All of the above
4- The efficiency of a transformer is maximum when
(a) Constant losses = Iron losses
(b) Variable losses = Copper losses
(c) Core losses = Copper losses
(d) Constant losses = Core Losses
5-The No-load characteristics of a de shunt generator is also called:
(a) The performance characteristics
(b) The voltage regulation characteristics
(c) Total characteristics
(d) Magnetizing characteristics
6- The reason for the fall of the terminal voltage due to a load of a de shunt
generator:
(a) Armature resistance drop
(b) Armature reaction drop
(c) Reduction in field current
(d) All the above
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