Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Textbook Question
Chapter 7, Problem 17P
Determine from the hysteresis curves in Figure 7-52 which material has the most relentivity.
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Paramagnetic materials have relative permeability
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Chapter 7 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 7 - The tesla (T) and the gauss (G) are both units for...Ch. 7 - The unit for measuring magnetomotive force (mmf)...Ch. 7 - Ohm’s law for a magnetic circuit gives the...Ch. 7 - A solenoid is a form of electromagnetic switch...Ch. 7 - A hysteresis curve is a plot of flux density (B)...Ch. 7 - To produce an induced voltage in a coil, the...Ch. 7 - Prob. 7TFQCh. 7 - Prob. 8TFQCh. 7 - Prob. 9TFQCh. 7 - Prob. 10TFQ
Ch. 7 - Prob. 1STCh. 7 - Prob. 2STCh. 7 - Prob. 3STCh. 7 - Prob. 4STCh. 7 - Prob. 5STCh. 7 - Prob. 6STCh. 7 - Prob. 7STCh. 7 - The electromagnetic activation of a movable shaft...Ch. 7 - When there is current through a wire placed in a...Ch. 7 - Prob. 10STCh. 7 - Prob. 11STCh. 7 - Prob. 12STCh. 7 - Prob. 13STCh. 7 - Prob. 14STCh. 7 - Prob. 15STCh. 7 - The cross-sectional area of a magnetic field is...Ch. 7 - In a certain magnetic field the cross-sectional...Ch. 7 - Wha is the flux in a magnetic material when the...Ch. 7 - At a given location, the earth’s magnetic field...Ch. 7 - A very strong permanent magnet has a field of...Ch. 7 - Prob. 6PCh. 7 - What is the relative permeablility of a...Ch. 7 - Determine the reluctance of a material with a...Ch. 7 - What is the magnetomotive force in a 500 turn coil...Ch. 7 - Typically, when a solenoid is activated, is the...Ch. 7 - Prob. 11PCh. 7 - Explain the sequence of events in the circuit of...Ch. 7 - Prob. 13PCh. 7 - What is the magnetizing force in Problem 9 if the...Ch. 7 - How can the flux density in Figure 7-51 be changed...Ch. 7 - In Figure 7-51, determine the following if the...Ch. 7 - Determine from the hysteresis curves in Figure...Ch. 7 - According to Faraday’s law, what happens to the...Ch. 7 - The voltage induced across a certain coil is...Ch. 7 - Prob. 20PCh. 7 - A 20 cm long conductor is moving upward between...Ch. 7 - Prob. 22PCh. 7 - If a generator is 80% efficient and delivers 45 W...Ch. 7 - Prob. 24PCh. 7 - If the output voltage in Problem 24 is 14 V, what...Ch. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - A basic one-loop de generator is rotated at 60...Ch. 7 - Assume that another loop of wire. 90 from the...
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- circut for the core. (₁ For the ferromagnetic core shown in the gure below draw the magnetic The magnitudes of the reluctances are not important but clearly indicate on your circuit every reluctance which should be calculated for the given core. 10 15 = 0.5A d DNI 15 0.03 N2 1₂ = 0.1A 9arrow_forwardA meter has a square law scale .for 2A current the deflection in 90°. for of a deflection of 45 °, the current isarrow_forwardFor figure (1)draw and calculate the voltages waveform across each half of secondary winding and across load when 100sin2π60t applied across the primary, then find PIV.arrow_forward
- How temperature effect conductivity? Explain with the help of following equation. m e'n7'arrow_forwardA Moving to another question will save this response. Quèstion 12 Paramagnetic materials have relative permeability Equal to unity Equal to that ferromagnetic materials Slightly more than unity Slightly less than unity P Type here to search hparrow_forwardA certain laminated core has a permeability of 3,150. The length is 4.85 cm and the cross section is 2.32 sq. cm. What is its reluctance?arrow_forward
- a. individal current b. voltage sourcearrow_forwardMatch the following: (i) Hysteresis loss (a) Can be redud by constructing the core with laminated sheets of alloy steel (ii) Eddy current loss (b) Can be reduced by the use of special high grades of alloy stl as core material.arrow_forwardWhat are the types of semicondoctors availablearrow_forward
- There is 50 mA of current through a coil with 250 turns. The flux is 150 µWb. What is the mmf? What is the reluctance of the circuit? A. Fm = 1.25 At - R=4.3x10-3 At/Wb B. Fm = 2.25 At - R=8.3x10-3 At/Wb C. Fm = 1.25 At - R=8.3x10-3 At/Wb D. Fm = 1.25 At - R=8.3x10-2 At/Wbarrow_forwardCalculate the inductance for a coil with 120 turns, a current of 0.47 mA, and a flux of 1.2x10 Wb. b H a S ww Rarrow_forwardSketch even and odd for this figurearrow_forward
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