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 23P
If a generator is 80% efficient and delivers 45 W to a load, what is the input power?
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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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 4-ls the residual magnetism on the generator is necessary how can you cancel these residual magnetism in D.c generatorarrow_forwardThe voltage generated by a dc generator is 230V, determine the generated emf if the speed is increased by 20% and the flux is simultaneously reduced by 10%.arrow_forwardA 243.5 shunt Generator generates 4.5 Amps. Its Armature resistance is 1.1 Ohms. What is the Generated emf of the DC Generator?arrow_forward
- A 30kW generator has an armature resistance of 0.45 ohms, generates a terminal voltage of 225 V at full load. Neglect field current and field copper loss. Iron and mechanical losses are 2.4kW. What will be the efficiency of the generator?arrow_forwardWhen generator is being driven at 1200 rpm, the generated emf is 230V. What is the generated emf if the field flux is decreased by 10% with the speed remain unchanged?arrow_forwardWhat are the conditions that may be satisfied so that two different generators shall share a load in proportion to their powers?arrow_forward
- Q- In a DC generator, what will be change in emf induced if flux is reduced by 20% and the speed is increased by 20%.arrow_forwardA shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed? *arrow_forwardA 50kW, 500V short shunt generator has an armature resistance, series field resistance and shunt field resistances are 0.05 ohms, 0.06 ohms and 253 ohms respectively. What is the power generated?arrow_forward
- Suppose there is a load that needs 120W of power and is located 50ft from a generator with a total resistance of 0.2525 Ohms. The load can be designed to operate at 12V or 120V. Find the voltage drop and power losses in the connecting wire for each voltage and comment on the results.arrow_forward10 kW, 230 V, d.c shunt generator is operating at rated condition with 80% efficiency. Input power and the total loss are respectivelyarrow_forwardA four pole machines generates 250V when operated at 1500 rpm. If the flux per pole is 1.85 x 106 maxwell, the number of armature slots is 45 and the armature winding has two parallel paths. If the speed of the generator is reduced to 1350 rpm, what would be the generated voltage. To what value of flux per pole should the excitation be adjusted if the generated voltage is to remain the same at 250Varrow_forward
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