Calculate the resistivity of a manufactured “run" of annealed copper wire at 20°C , in ohm -circular milsper foot , if its conductivity is a) 96.5 % b) 100.8%An electric motor drives a mechanical load taking 18.8 amperes from a 230V source. a) Calculatethe power input of the motor b) the horsepower output of the motor if it operates at an efficiency of86.4%A coil of wire having a resistance of 3.84 ohms and carrying a current of 0.15A is in parallel with anunknown resistance thru which there is a current of 1.44A.. Calculate the unknown resistance R11. RssisTIrrTINS OF COMMON ISGNMEINAN ANAlloyaKtemenis42Brass......German silver.... .Manganin..Lucero..Advance...Constantan..Excello.....Nichrome..Nichrome II..Chromel....9.9....Sitree.....Cegper, annealed..... 10.37Cegger, hard-drawn... 10.65Gold, pare...Aluminuam.199265....280294302550600141728Magnesium.Tungsten.Eine..Nickel.333647660625-655Isn, cast.Platinum.5460Insn, commercial.Lead.Meroury.75132....577

1) Given annealed copper at 200 c Resistivity of the annealed copper at 20° c is 10.37 ohm-circular…

Answered: Calculate the resistivity of a…

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter16: Installation Of Heating, Cooling, And Refrigeration Systems

Section: Chapter Questions

Problem 2RQ

See similar textbooks

Similar questions

b. A piece of pencil lead is connected in series with an ammeter and a power supply. The power supply is turned on. After a few minutes, although the potential difference across the pencil lead does not change, the current in the circuit increases significantly. Explain why the current increases. c. Electric fields are caused by both point charges and by parallel plates with a potential difference across them. Describe the difference between the electric field caused by a point charge and the electric field between parallel plates. Your answer should include a diagram of each type of field and reference to electric field strength. Question 2
6.A purely resistive electric furnace is connected in parallel with a motor with lagging power factor less than 1.0. The combination of both charges will give an equivalent charge: a) With the same power factor as that of the motor. b) With a power factor closer to 1 than that of the motor. c) With a power factor lower than that of the motor. d) It cannot be indicated with the information provided. e) there is no solution
A 5 turns of wire experiences two amperes. a) what is the mmf? b) what is the reluctance of the circuit if the flux is 250μWb?
0.1 Give a short answer for only Six of the following 1. Explain the construction of turbine meter and mention for what we use it. 2. Mention the Applications of Pyroelectric sensors. 3. Explain briefly Hall effect sensor's application by measuring the fluid level in a container. 4. Explain how could we use potentiometer to measure linear displacement and angular displacement. 5. According to electrical circuits and electric fundamentals what's the evident difference between Eddy current proximity sensor and Inductive proximity sensor? 6. What's the purpose of putting an inner track with only one hole in optical sensor? 7. What's the reason behind using Wheatstone bridge with strain gauge sensor?
Question 4 a) B M Figure 4 Figure 4 shows the graph of the ripple current. Answer the following i. Describe the function of A. ii. iii. Describe the function of B. Identify the ideal paramater to get the good power supply.
What is the effect on induced voltage of adding more turns of wire to a coil? Select one: A. IT STAYS THE SAME B. THE TOTAL IS THE RECIPROCAL C. IT ADDS TOGETHER D. NOTHING
1. What is the reluctance of 10 cm diameter silicon steel of 2500 permeability with a mean length of 20 cm? A. 0.000201 cgs B. 0.000102 cgs C. 0.000212 cgs D. 0.000123 cgs 2. At what rate the flux must be varied to measure 12 V across the terminal of 300 turns coil? A. 0.05 Wb/s B. 0.04 Wb/s C. 0.03 Wb/s D 0.02 Wb/s
1. Explain the conventional nature of electricity. 2. Explain ohms law.
QUESTION 20 A 9.0-V battery is hooked to a 3.0 ohm resistor. What current is flowing through the circuit? O a. 27.0 A O b.0.3 A OC.3.0 A O d. 12.0 A QUESTION 21 What is voltage? O a. The flow of protons Ob. the number of charged particles that pass each second Oc the difference in potential energy of charged particles Od. the rate at which the energy is being transformed
Consider Figure 3.5. Match the following, those on the left to those on the right. (i) Im (a) Exciting current (ii) Ic (b) Magnetizing Current (iii) Ie (c) core loss current
A coil consists of 5000 turns of copper wire having a circular - section of diameter 0.0045 m. The mean length per turn is 0.8 m and the electrical resistivity of copper is 0.03 μΩ–m. Determine the resistance of the coil in μΩ.
11) The resistance of a copper at 30°C is 500. If the temperature coefficient of copper at 0°C is 0.00427. What is the resistance at 100°C?

SEE MORE QUESTIONS

Recommended textbooks for you

Electricity for Refrigeration, Heating, and Air C…

Mechanical Engineering

ISBN:

9781337399128

Author:

Russell E. Smith

Publisher:

Cengage Learning

Power System Analysis and Design (MindTap Course …

Electrical Engineering

ISBN:

9781305632134

Author:

J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:

Cengage Learning

Electricity for Refrigeration, Heating, and Air C…

Mechanical Engineering

ISBN:

9781337399128

Author:

Russell E. Smith

Publisher:

Cengage Learning

Power System Analysis and Design (MindTap Course …

Electrical Engineering

ISBN:

9781305632134

Author:

J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS