False True If field resistance of a d.c. shunt generator is increased beyond its critical value, the generator output voltage will exceed its rated voltage The electrical power developed by the armature of ad.c. motor is equal to back emf multiplied by Armature current

False True If field resistance of a d.c. shunt generator is increased beyond its critical value, the generator output voltage will exceed its rated voltage The electrical power developed by the armature of ad.c. motor is equal to back emf multiplied by Armature current

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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Similar questions

A four-pole, lap wound, long shunt generator produces 0.07 Wb of flux per pole. The armature winding contains 220 turns with a resistance of 0.004 ohm per turn. Calculate the terminal voltage when the generator is running at 900 rpm with an armature current of 50 A and the resistance of the shunt and series fields are 100 ohms and 0.02 ohm, respectively. Additionally, determine the generator's output power. (Draw the circuit diagram)
A shunt generator is connected to a load that draws 30 KW on full-load. The armature resistance is 0.1 ohm. If the power generated in the armature is 33.50 KW, and the shunt field resistance is 80 ohms, determine the: A. Variable copper loss B. Constant loss C. Maximum efficiency.
2. Explain which of the following instructions are invalid? State the invalidation reason and give the correct form for invalid instructions: a. MOV DL,AX b. MOV ES,CX c. MOV [BX],[2000] d. MOV BX,[AX] e. MOV CL,[BL+200] f. MOV 1234,DX g. MOV CH,[BX+SI+300] h. MOV DS,[SI+DI-5] i. MOV [4500],1234 j. MOV 200,[300]
1. A separately-excited DC generator has a magnetization curve shown in Figure 1. What is the internally-generated voltage EA in volts if its prime mover speed is 1400 RPM and the current through the field circuit is 7 A? (answer in 2 decimal places) 2. if the armature resistance RA = 0.2 ohms and the generator is connected to a 5 ohm load, what is the generator terminal voltage VT in volts? (answer in 2 decimal places)
An 8 pole DC shunt generator with wave winding has 4800 conductor with 20 turns and average per pole flux is 20 mwb and armature current and armature resistance is 20 A and 0.5 ohm respectively find? (i) Induced emf (ii) Terminal voltage
In a 4 pole DC shunt generator with a shunt field resistance of 100 ohms and an armature resistance of 1 ohm has 378 wave connected conductors in its armature. The flux per pole is 0.02 Wb. If a load resistance of 10 ohms is connected across the load terminals and the generator is driven at 1000 rpm, calculate the power absorbed by the load.
3. A shunt generator supplies a 50-kW load at 400 V through cables of resistance 0.2. If the field winding resistance is 50 and the armature resistance is 0.05, determine a) the terminal voltage b) the e.m.f. generated in the armature.
Q6// Answer the Following Questions: 1-Explain the construction and principle of operation of a D.C generator. 2- Compare between magnetic and an electric circuits. 3-Derive E.M.F equation of a D.C generator, and what are the factors on which the E.M.F depends? 4- How can to control the terminal voltage of the shunt DC generator? 5- A DC shunt motor is running at rated speed with a resistance R in series with the armature; will the speed of the motor increase or decrease if additional resistance of finite value is connected (a) across R and (b) in series with R?
Solve it quickly please
Q1) A 6 pole, lap wound DC shunt generator has an armature resistance of 0.1 2 and a shunt field resistance of 100 2. The generator supplies two loads as follows, Load 1 (L1): A 10 KW heater at a terminal voltage of 100 V. Load 2 (L2): 50 Lamps, each lamp is rated at 60 W, at a terminal voltage of 100 V. The machine has 500 conductors and a constant flux of,10 mwb/pole. a) Calculate the total load current. b) Find the generated voltage, Eg, and speed of the machine in rpm. c) If all lights are turned off, calculate the generated voltage of the machine, Eg, and the speed of the machine. Assume flux remains constant.
A long-shunt compound generator delivers 80 A at 250 V and has the following armature, series field and shunt field resistances of 0.04 ohm, 0.036 ohm and 65 ohms. Considering 1 volt per brush contact drop, calculate the generated voltage.