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 14P
What is the magnetizing force in Problem 9 if the length of the core is 0.2 m?
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Students have asked these similar questions
Question: 01
A three-legged circular core is shown in figure below. The winding on the left leg of the
core (N) has 800 turns. The depth of the core is 10 cm. If the dimensions are as shown,
then determine the total reluctance of the given core when u, = 500 and constant.
15ст
N=800
50ст
Scm
15ст
60cm
20cm
b1- The given ferromagnetic core relative permeability is 800. Determine the total
reluctance of the core.
35 cm
10 cm
20 cm
50 cm
15 cm
45 cm
15 cm
15 cm
10 cm
uèstion 5
Consider the magnetic circuit in Figure. Assuming that the core u= 1000uo has a uniform cross section
of 4 cm N= 400, the flux density in the air gap.
0.2 A
L-42 cm
04-0.1 cm
35.4 mwb
605 mwb
70 8 mwb
arch
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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- The Ohms law for the magnetic circuit states that the net magnetomotive force (mmf) equals the product of the core reluctance and the core flux. (a) True (b) Falsearrow_forwardA ferromagnetic core in the shape of a doughnut has a cross-sectional area of 0.11 m2 and an average length of 1.4 m. The permeabil ity of the core is 1.206 × 10-3 Wb/A-t. m. Determine the reluctance of the magnetic circuitarrow_forwardFor the magnetic core of Figure, the flux density at cross section 1 is B1=0.4T. Determine B2 A₁ = 2 × 10-2 m² Ф Φ A₂ = 1 × 10-2 m²arrow_forward
- For the figure shown below, the permeability in the core is 4 x 104 Wb/A-tums-m. What is the value of flux density (in T) in the core? 5 cm 60 turnsarrow_forward3- A magnetic core with an air gap is shown in below Figure. The depth of the core is 3 cm, the length of the air gap in the core is 4 cm, and the number of turns on the coil is 100. How much current is required to produce total flux of 0.00052 Weber? (H= 2000, Ho=4.n107). 6 cm 20 cm N = 100 4 cm = lg 6 cm 6 cm 18 cm 12 cm 18 cm 6 ст Depth = 3 cmarrow_forwardQuestion 1 A ferromagnetic core with a relative permeability of 1500 is shown in Figure 2. The dimensions are as shown in the diagram, and the depth of the core is 7 cm. The air gaps on the left and right sides of the core are 0.070 and 0.020 cm, respectively. Because of fringing effects, the effective area of the air gaps is 5 percent larger than their physical size. If there are 400 turns in the coil wrapped around the center leg of the core and if the current in the coil is 1.0 A, what is a) the flux in each of the left, center, and right legs of the core? b) the flux density in each air gap? 7 cm ст ст 30 cm 30 cm 7 cm 400 turns 0.05 cm 30 cm 0.07 cm 7 cm Core depth = 7 cm Figure 2arrow_forward
- 4-ls the residual magnetism on the generator is necessary how can you cancel these residual magnetism in D.c generatorarrow_forwardQuestion: 01 A two-legged core is shown in figure below. The winding on the left leg of the core (N) has 800 turns. The depth of the core is 15 cm. The small airgap is 0.05 cm and there is no fringing effect. If the dimensions are as shown, then determine the total reluctance of the given core when u, =800 and constant. 15cm 25cm 10cm 10cm 50cm N=800 5cmarrow_forwardGiven: N=1000 I=1A μ = 1000 a μ = 1200 b The magnetic core is made up of iron with square. The total reluctance is Blank 1 AT/Wb, the reluctance in the two airgap is Blank 2 AT/Wb and the flux is Blank 3 mWb. -Part-A -Part-B 20 cm- 3 cm 10 cm- -2 mm ..arrow_forward
- A 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_forwardThe magnetic susceptibility of aluminium is 2.1×10-5. The permeability and relative permeability are, respectively?arrow_forward3- A magnetic core with an air gap is shown in below Figure. The depth of the core is 3 cm, the length of the air gap in the core is 4 cm, and the number of turns on the coil is 100. How much current is required to produce total flux of 0.00052 Weber? (Hr= 2000, µo=4.r107). 6 cm $3 20 cm N = 100 4 cm = lg 6 ст 6 cm 18 cm 12 cm 18 cm 6 cm Depth = 3 cmarrow_forward
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