Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Question
Chapter 7, Problem 11P
(a)
To determine
The forces that move the plunger when the solenoid is active.
(b)
To determine
The forces that causing the plunger to its rest position.
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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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- The principle operation of LVDT is based on the variation of Select one a. Self inductance b. Reluctance c. Mutual inductance d. Permanencearrow_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_forward3. How does a split ring commutator work? * Coll rotation Coil Commutator a) Swaps the contact every full turn, so that the left-hand and right-hand arms of t coil always experience a force in the same direction. b) Swaps the contact every half turn, so that the left-hand and right-hand arms of coil do not experience a force in the same direction. c) Swaps the contact every half turn, so that the left-hand and right-hand arms of coil always experience a force in the same direction.arrow_forward
- This course Is this armature winding a progressive or a retro-progressive winding? 3. d х у a Select one: O a. Both O b. Progressive OC. Neither O d. Retro-progressivearrow_forward4. Two current-carrying loops are arranged so that one of the loops just sits above the other just like in the figure below. The current in each loop is directed counterclockwise. Draw the resulting magnetic field for each loop to determine how the loops will "interact" with each other. 00arrow_forwardWhy do motors have gaps or breaks throughout the rotor and commutator? It makes the motor cheaper since not as much material is needed. Only some sections of the rotor will act as electromagnets, causing the rotor to always be pushed in the same direction. It allows some of the magnetic field to escape so that rotor doesn't get too stressed. It lets air into the motor to keep it cool since the electricity can make it hot. It happens when rotors don't use enough oil, so they crack.arrow_forward
- A rectangular coil of wire has a length of 3 cm and a width of 4 cm. It is in a 0.004 T magnetic field. What is the magnetic flux through the coil if the face of the coil is parallel to the B-field lines? What is the flux if the angle between the face of the coil and the magnetic field is 75°?arrow_forwardFull scale deflecting torque of 10 A MI Ammeter is 5 x 10-5 N-m. The rate of change of self inductance of the instrument at full scale in "uH per radian" isarrow_forwardin a dc machine 72 number of coils are used. Find the number of commutator ?segments required 72 O 36 O 37 O 74 Oarrow_forward
- magnetic forcearrow_forwardConsider a coil as Figure 10 turns, placed in a magnetic field B= (100 x2 cos 103t) az T and R=10000 Determine the current in the circuit. The units of length are in m R -0.1 + Vemf 0.1 -0.1 B 0.1arrow_forwardYou have a solenoid with an into all current of 577A and a turn dentistry of 6601 loops/m What is the intial magnetic field through the solenoid ? the current in the solenoid drops to 34 A over the course of 4ms. What is the final magetic field through the solenoid ? the coil has a resistance of 20. What is the current though the coil? what is the power disssipated by the coil? inside the solenoid 56loops and a radius of 6.2cm. What is the magnitude of the induced in the 56 turn coil. Positive nunberarrow_forward
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