Engineering Electromagnetics
Engineering Electromagnetics
9th Edition
ISBN: 9780078028151
Author: Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher: Mcgraw-hill Education,
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Chapter 9, Problem 9.8P

A perfectly conducting filament is formed into a circular ling of radius a. At one point, a resistance R is inserted into the circuit and at another a battery of voltage V0 is inserted. Assume that the loop current itself produces negligible magnetic field. (a) Apply Faraday’s law, Eq. (4)= evaluating each side of the equation carefully and independently to show the equality; (b) repeat part a: assuming the battery is removed the ring is closed again, and a linearly increasing B field is applied in a direction normal to the loop surface.

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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)
The magnetic core in Figure 3. has a mean core length of 80 cm, and its uniform cross-sectional area is 10 cm?. The relative permeability of the core is 1,500, and an AC voltage source e(t) =60 cos(120 t )V is connected across the coil of N = 100 turns. Obtain an expression fo n the core and the current in the coil.
Induced voltage acts like a resistance to hinder the flow of current through an inductor.  True or False It is often more desieable to the conductor instead of the magnetic field.  True or False
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