If we want to make a coil consisting of an aluminum wire of length (100 m), so that it carries a current of (5 A), when the potential difference between its ends is (220 V), what is the value of: 1. Wire resistance? 2. Wire cross-sectional area? 3. The lost power in the wire when the current flows in it? Note that the resistivity of Aluminum is (2.8 x 10-8 Qm).

If we want to make a coil consisting of an aluminum wire of length (100 m), so that it carries a current of (5 A), when the potential difference between its ends is (220 V), what is the value of: 1. Wire resistance? 2. Wire cross-sectional area? 3. The lost power in the wire when the current flows in it? Note that the resistivity of Aluminum is (2.8 x 10-8 Qm).

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

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

See similar textbooks

Similar questions

An ac resistance is higher than a dc resistance. True False
How temperature effect conductivity? Explain with the help of following equation. m e'n7'
We want to investigate how the field strength will be with air as dielectric and with steatite. A plate capacitor is placed in a 24 kV network between phase and ground. The relative permittivity of air is &=1 and for steatite &-6. The plate capacitor has area = 1m². The distance between the electrodes is 2 mm. Ep = 8.854-10-12 F/m A=1m² d=2mm a) Calculate the maximum field strength in the plate capacitor. (Answer: 9.8kV/mm) b) What is the capacitance of the capacitor if we use steatite? (Answer: C = 26.6nF)
A coil has a resistance of 18 when it mean temp is from 20o C to 50o C. Find its mean temp rise when its resistance is 21 and the surrounding temp is 15o C. A potential difference of 250 V is applied to a copper field coil at a temp of 15o C and the current is 5A. What will be the mean temp of the coil when the current has fallen to 3.91 A, the applied voltage being the same as before.
Identify the statement from the following when the inductance can have high value. a. All the given options O b. If the number of turns of the wire is more O c. If the length of the wire is longer O d. If the cross-sectional area is less
Problem 3 -10t The current flowin through a 5 H coil is given by 12e7 A. Find an expresion for the voltage, power, and stored energy. Sketch the waveforms to scale for the current, voltage, power, and energy from t = 0 to t = 500 ms.
An iron core 0.4m long and 5 cm2. In cross section, is wound with 300 turns. When a current of 0.5 A flows in the coil, how much is the inductance of the coil. Assume the core has a permeability of 2500. Ans 350mH
2 The figure is a graph of ... 5 (5 Points) Current Voltage the current across a voltage as a function of the potential difference through it the resistance as a function of the current across a component the current through a component as a function of the voltage across it All three of the above (a), (b), and (c) are true None of the above (a), (b), or (c) is true
c) A platinum coil has a resistance of 3.146 at 40°C and 3.767 at 100°C. Find the resistance at 0°C and the temperature -coefficient of resistance at 40°C.
6 6 - A dielectric is a material that is: A) a semiconducting B) a nonconducting C) a superconducting D) none of them E) a conducting
Q# 4 What current I is flowing around a loop shown in Figure and Draw this current as function of time. What happens if someone suddenly cuts the wire? hepe P
400 V is the input voltage given to a chopper, the required output is 650 V. The thyristor is conducting 300 usec. what is the addition of conducting and non conducting period? (Write your answer in usec) Answer: