Fill in the blank: 1- Lap winding is suitable for current, voltage d.c. generators. 2-A 220 V shunt motor develops a torque of 54 N-m at armature current of 10 A. The torque N-m. produced when the armature current is 20 A, is --------- 3- The d.c. series motor should never be switched on at no-load because 4- The equation relating the generated e.m.f., E, terminal voltage, armature current and armature resistance for a d.c. motor is E = ‒‒‒‒‒‒‒‒ ‒‒‒‒‒‒‒‒‒‒
Fill in the blank: 1- Lap winding is suitable for current, voltage d.c. generators. 2-A 220 V shunt motor develops a torque of 54 N-m at armature current of 10 A. The torque N-m. produced when the armature current is 20 A, is --------- 3- The d.c. series motor should never be switched on at no-load because 4- The equation relating the generated e.m.f., E, terminal voltage, armature current and armature resistance for a d.c. motor is E = ‒‒‒‒‒‒‒‒ ‒‒‒‒‒‒‒‒‒‒
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
![Fill in the blank:
1- Lap winding is suitable for -----
current,
voltage d.c. generators.
2-A 220 V shunt motor develops a torque of 54 N-m at armature current of 10 A. The torque
produced when the armature current is 20 A, is
N-m.
3- The d.c. series motor should never be switched on at no-load because
4- The equation relating the generated e.m.f., E, terminal voltage, armature current and
armature resistance for a d.c. motor is E =
‒‒‒‒‒‒‒‒‒‒‒
5- A transformer having 1000 primary turns is connected to a 250 V a.c. supply. For a
secondary voltage of 400 V, the number of secondary turns should be
turns.
6- The equivalent resistance of the primary of a transformer having N2/N1 = 5 and R1 = 0.1
ohm when referred to secondary becomes
ohm.
7- The maximum efficiency of a 100 kVA transformer having iron loss of 900 W and F.L.
cu loss of 1600 W occurs at - kVA.
‒‒‒‒‒‒
‒‒‒‒‒‒‒
8- If Cu loss of a transformer at 7/8 full load is 4900 W, then its full-load Cu loss would be
watt.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7ed43cbd-7d0d-44bb-89fe-024c3da46de0%2Fd2052eb8-38c7-4d1d-b511-6cae039eaa06%2Fowjql6_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Fill in the blank:
1- Lap winding is suitable for -----
current,
voltage d.c. generators.
2-A 220 V shunt motor develops a torque of 54 N-m at armature current of 10 A. The torque
produced when the armature current is 20 A, is
N-m.
3- The d.c. series motor should never be switched on at no-load because
4- The equation relating the generated e.m.f., E, terminal voltage, armature current and
armature resistance for a d.c. motor is E =
‒‒‒‒‒‒‒‒‒‒‒
5- A transformer having 1000 primary turns is connected to a 250 V a.c. supply. For a
secondary voltage of 400 V, the number of secondary turns should be
turns.
6- The equivalent resistance of the primary of a transformer having N2/N1 = 5 and R1 = 0.1
ohm when referred to secondary becomes
ohm.
7- The maximum efficiency of a 100 kVA transformer having iron loss of 900 W and F.L.
cu loss of 1600 W occurs at - kVA.
‒‒‒‒‒‒
‒‒‒‒‒‒‒
8- If Cu loss of a transformer at 7/8 full load is 4900 W, then its full-load Cu loss would be
watt.
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