Delmar's Standard Textbook of Electricity (MindTap Course List)
6th Edition
ISBN: 9781285852706
Author: Stephen L. Herman
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
thumb_up100%
Chapter 10, Problem 1RQ
To what is the turning force of a d’Arsonval meter movement proportional?
Expert Solution & Answer
To determine
The quantity to which the turning force of a d’Arsonval meter movement proportional to?
Answer to Problem 1RQ
The turning force of a d’Arsonval meter movement is proportional to the strength of the magnetic field developed in the current carrying coil.
Explanation of Solution
Description:
The underlying principle behind operation of the d’Arsonval meter movementis that like magnetic poles repel each other. The turning force of depends on the repulsion of magnetic fields. A magnetic field is created around the coilas current passes through it.
The flow of current is such that the polarity of the permanent magnet and that of the magnetic pole created around the coil is the same. As like magnetic poles repel each other, the coil is deflected away from the pole of the magnet. A spring provides the damping movement to the turning of the coil. The turning distance against the spring is proportional to the strength of the magnetic field developed in the current carrying coil.
Conclusion:
The quantity on which the turning force of a d’Arsonval meter movement is dependant has been explained.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Design a lowpass FIR filter using frequency sampling technique having cut-off frequency of T/2
rad/sample. The filter should have linear phase and length of 17.
A dc compound motor having a rating of 10 kW,
1150 r/min, 230 V, 50 A, has the following losses at
full-load:
bearing friction loss
40 W
brush friction loss
==
50 W
windage loss
=
200 W
(1)
total mechanical losses
=
290 W
(2)
iron losses
=
420 W
(3)
copper loss in the shunt field
=
120 W
copper losses at full-load:
(4)
a. in the armature
b. in the series field
c. in the commutating winding
total copper loss in the
500 W
25 W
70 W
armature circuit at full-load
=
595 W
4 What determines the power rating of a ma-
chine?
-5 If we cover up the vents in a motor, its out-
put power must be reduced. Explain.
-6 If a motor operates in a cold environment,
may we load it above its rated power? Why?
Chapter 10 Solutions
Delmar's Standard Textbook of Electricity (MindTap Course List)
Ch. 10 - To what is the turning force of a dArsonval meter...Ch. 10 - Prob. 2RQCh. 10 - A DC voltmeter has a resistance of 20,000 per...Ch. 10 - 4. What is the purpose of an ammeter shunt?
Ch. 10 - 5. Name two methods used to make a DC multirange...Ch. 10 - 6. How is an ammeter connected into a circuit?
Ch. 10 - 7. How is a voltmeter connected into a circuit?
Ch. 10 - 8. An ammeter shunt has a voltage drop of 50 mV...Ch. 10 - 9. What type of meter contains its own separate...Ch. 10 - 10. What electrical quantity does the oscilloscope...
Ch. 10 - 11. What is measured on the Y axis of an...Ch. 10 - 12. What is measured on the X axis of an...Ch. 10 - 13. A waveform shown on the display of an...Ch. 10 - 14. What is the major difference between a...Ch. 10 - 15. What two factors determine the turning force...Ch. 10 - You are an electrician on the job. You have been...Ch. 10 - 1. A d'Arsonval meter movement has a full-scale...Ch. 10 - The meter movement described in Question 1 is to...Ch. 10 - 3. A meter movement has a full-scale value of . A...Ch. 10 - The meter movement described in Question 1 is to...Ch. 10 - 5. A digital voltmeter indicates a voltage of 2.5...
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
- An electric motor driving a skip hoist with- draws 1.5 metric tons of minerals from a trench 20 m deep every 30 seconds. If the hoist has an overall efficiency of 94 percent, calculate the power output of the motor in horsepower and in kilowatts.arrow_forwardThe efficiency of a motor is always low when it operates at 10 percent of its nominal power rating. Explain.arrow_forwardA dc motor connected to a 240 V line pro- duces a mechanical output of 160 hp. Knowing that the losses are 12 kW, calculate the input power and the line current.arrow_forward
- A 115 V dc generator delivers 120 A to a load. If the generator has an efficiency of 81 percent, calculate the mechanical power needed to drive it [hp].arrow_forwardA machine having class B insulation attains a temperature of 208°C (by resistance) in a torrid ambient temperature of 180°C. a. What is the temperature rise? b. Is the machine running too hot and, if so, by how much?arrow_forward1 Name the losses in a dc motor. 2 What causes iron losses and how can they be reduced? -3 Explain why the temperature of a machine increases as the load increases.arrow_forward
- 20. A tractor weighing 14 kN with a wheel base of 3m carries an 8 kN load on its rear wheel. Compute the maximum bending moment and shear when crossing a 4.5 span. Consider the load only at the wheels.arrow_forwardA 110-V, three-phase, Y-connected, 8 pole, 48-slot, 6000-rpm, double-layer wound chronoun anı vonorotor boo 10 +1 urn or oilarrow_forward-7 Name some of the factors that contribute to the deterioration of organic insulators. -8 A motor is built with class H insulation. What maximum hot-spot temperature can it withstand?arrow_forward
- Calculate the full-load current of a 250 hp, 230 V dc motor having an efficiency of 92 percent.arrow_forwardAssignment #2 A 110-V, three-phase, Y-connected, 8 pole, 48-slot, 6000-rpm, double-layer wound, synchronous generator has 12 turns per coil. If one side of the coil is in slot 1, the other side is in slot 6. There are 4 parallel paths. When the generator delivers the rated load at a line voltage of 110 V, the voltage regulation is 5%. What is the flux per pole? Draw two consecutive phasegroups of one of the phase windings and connect them (a) in series and (b) in parallel showing the Start (S) and Finish (F) of both connections. (A separate drawing for each connection)arrow_forward3-4 Transmissiva Live of 120km has R= 0.2 ~2/15 X= 0.8 -2/km Y = 15H/6 5/km The line is supplies a load of 45 kV, SOMW, 0.8 lead p.f find sending voltage, Sending Current p.f. Sanding Voltage Regulation ⑨Voltage 5 Ⓒ charching coming! изу usy π cct लेarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Inductors Explained - The basics how inductors work working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=KSylo01n5FY;License: Standard Youtube License