Q4) select the right choice for the following sentences:1. The critical resistance of the d.c. generator is the resistance of(a) armature(b) field(c) load(d) brushes2. The external characteristic of a shunt generator can be obtained directlyfrom its......characteristic.(a) internal(b) open-circuit(c) load-saturation(d) performance3. Which of the following d.c. generator cannot build up on open-circuit?(a) shunt(b) series(c) short shunt(d) long shunt4. If a self-excited d.c. generator after being installed, fails to build up on itsfirst trial run, the first thing to do is to(a) increase the field resistance(b) check armature insulation(c) reverse field connections(d) increase the speed of prime mover.5. When load is removed, .......... motor will run atthe highest speed.(a) shunt(b) cumulative-compound(c) differential compound(d) series

In this question we will write about DC generator related problems... Note :- as.per our guidelines…

Q4) select the right choice for the following sentences: 1. The critical resistance of the d.c. generator is the resistance of (a) armature (b) field (c) load (d) brushes 2. The external characteristic of a shunt generator can be obtained c from its......characteristic. (a) internal (b) open-circuit (c) load-saturation (d) performance 3. Which of the following d.c. generator cannot build up on open-ci (a) shunt (b) series (c) short shunt

Q4) select the right choice for the following sentences: 1. The critical resistance of the d.c. generator is the resistance of (a) armature (b) field (c) load (d) brushes 2. The external characteristic of a shunt generator can be obtained c from its......characteristic. (a) internal (b) open-circuit (c) load-saturation (d) performance 3. Which of the following d.c. generator cannot build up on open-ci (a) shunt (b) series (c) short shunt

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...

See similar textbooks

Similar questions

5
Example 4-13 A 5.5-kW 220-V shunt generator has a field resistance of 140 , armature resistance of 0.52, and stray power losses of 95 W at rated conditions. Find at rated load: (a) The field current (b) The load current (c) The armature current (d) The generated voltage (e) The total copper loss (f) The efficiency (g) The voltage regulation (for this, assume that the flux, hence E., remains constant)*
DC generators
A 12-kW, 250-V dc. shunt generator has armature and field resistances of 0.68 ohm and 120 ohm. respectively. Determine the total armature power developed in generator.
For a dc generator, the current of the shunt winding is small as compared to armature current true False
A 250 V DC shunt generator has a constant loss of 1250 W. Find the load current for maximum efficiency. Also find the value of maximum efficiency and output power times maximum efficiency. The armature resistance is 0.10.
2. A 30-kW, 500-V dc short-shunt generator has armature, series field and shunt field winding resistances of 0.14 Q, 0.22 Q and 100 O respectively. Determine the voltage regulation at (a) 90.125% load, (b) 79.794% load and (c) 65.654% load.
In a long shunt DC generator, Shunt winding is parallel with the Series filed winding and Armature winding of the DC generator. Select one: True False
short shunt compound generator delivers a load current of 10A at 200V and has a shunt field resistance 200 ohms. The shunt field current of 2A. Then armature delivers a current of a.10A b.8A c.11A d.12A
(b) A DC shunt generator has a full-load current of 196 A at a terminal voltage of 220 V. The stray losses are 690W and the shunt field coil resistance is 55 ohm. The overall efficiency at full-load is 90%. Find (i) armature resistance (ii) constant losses and (iii) the load current corresponding to the maximum efficiency.
Q/ dc shunt generator 4 pole with 500 condcutor , wave running at speed 1000 r.p.m the resistance of armature and field are 0.02 , 55 ohm and delivering load 43.12kwatt at terminal voltage 220 volt, the iron losses is 750 watt 1-Torque developed by the prime mover .........and The torque developed by the armature ........... when running at 1000 r.p.m * 2-The load current ,,,,,,,,,,,,when the speed drops to 800 r.p.m. if If is unchanged ? * 3-Output of the prime motor…….kwatt * 4-Mechanical , electrical and overall efficiency …….. * 5-Flux per pole is......... wb *