Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Related questions
Concept explainers
Question
A 50 h.p, 440 V d.c. A shunt motor draws a current of 104 A from the mains when running at full load. The resistances of its shunt field winding and armature winding are 220 ohm and 0.4 ohm respectively. Then find (1) electrical efficiency (2)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by stepSolved in 2 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- A direct current shunt dynamo continuously supplies an ohmic load of 50 Ohm at terminal voltage Vt= 1000 V. The armature winding resistance is 5 Ohm and the shunt pole winding resistance is 200 Ohm. The sum of mechanical losses is 400 W. What is the percent efficiency of the dynamo under these operating conditions? a) 70 b) 74 c) 87 d) 78 e) 85arrow_forwardIron loss of DC motor is constant with the load. Select one: O True O Falsearrow_forward...dc motor...please...arrow_forward
- A 250 V d.c. shunt motor draws 4 ampere current from mains at no load and rotates at 700 r.p.m. Find out speed of motor when input power is 8 kW. Motor armature and field resistances are 0.6 ohm and 100 ohm respectively.arrow_forward5. A 20-kW, 400-V shunt DC generator has armature and shunt field winding resistances of 0.30 Q and 80 Q, respectively. The total mechanical loss is 1.7 kW. Determine the efficiency of the generator if the voltage regulation is 2.1%.arrow_forwardA DC motor has an internal resistance of 70. This motor has a no load speed of 3912rpm at 20V. This motor is now connected to a voltage divider as shown in the figure, where R1 and R2 are both 1840. Vs is 20V. What is the new no load speed of the motor? Give your answer in rpm. Numerical value only, no units required. + R₁ R₂ Vo Motorarrow_forward
- Can you solve the question ?arrow_forwardNEED IN 5 MINS PLEASE URGENT :(( The rotational losses in a dc motor is equal to 400 W. What is the efficiency if the motor output is 1 kW?arrow_forward3. For the simple DC motor system shown below, prove ke kt if the inductance of the winding is negligible. = Supply Vs Voltage i Armature Current VR R Back emf L VLarrow_forward
- A series motor has an armature resistance of 0.2 ohms and a series field resistance of 0.3 ohms. It is connected to a 240V supply at a particular load runs at 24 rev/s when drawing a 15A from the supply. Calculate the speed of the motor when the load is changed such that the current is increased to 30A. Answer is in rev/sec.arrow_forwardIn DC Shunt Motor the back emf E. = Select one: O a. V-IR O b. V/I.R₂ O C. V+ I₂R₂ O d. VI /R₂arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Introductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. BoylestadPublisher:PEARSON
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Programmable Logic ControllersElectrical EngineeringISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education 
Fundamentals of Electric CircuitsElectrical EngineeringISBN:9780078028229Author:Charles K Alexander, Matthew SadikuPublisher:McGraw-Hill Education
Electric Circuits. (11th Edition)Electrical EngineeringISBN:9780134746968Author:James W. Nilsson, Susan RiedelPublisher:PEARSON
Engineering ElectromagneticsElectrical EngineeringISBN:9780078028151Author:Hayt, William H. (william Hart), Jr, BUCK, John A.Publisher:Mcgraw-hill Education,
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:9780078028229
Author:Charles K Alexander, Matthew Sadiku
Publisher:McGraw-Hill Education
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:9780134746968
Author:James W. Nilsson, Susan Riedel
Publisher:PEARSON
Engineering Electromagnetics
Electrical Engineering
ISBN:9780078028151
Author:Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:Mcgraw-hill Education,