A 120.0-V motor draws a current of 9.65 A when running at normal speed. The resistance of the armature wire is 0.752 (a) Determine the back emf generated by the motor. (b) What is the current at the instant when the motor is just turned on and has not begun to rotate? (c) What series resistance must be added to limit the starting current to 15.0 A? (a) Number (b) Number (c) Number i Units Units Units V

Q: Assume that the resistance = 3.9 ohms, the width of the rails is 2.2 m, the magnetic field magnitude…

A:

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A: Given that,Resistance : R = 3 (Ohm)Back emf = 3 (V)EMF = 9 (V)Here we need to find the current flow…

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A: current = voltage/resistance

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A: Given: Emf, ε=8.60 V I∘=8.60 mAIa=1.00 mAIb=1.16 mA When the switch is open, Resistances R1,R2,R3…

Q: What is the effect on the EMF of increasing the number of turns of wire from N = 1 to N = 400?

A: The answer to the given question is as follows.

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Q: A 120.0-V motor draws a current of 5.92 A when running at normal speed. The resistance of the…

A: Given: V=120 Virunning=5.92 AR=0.629 Ω

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A: The back emf is represented as a variable emf that opposes the one driving the motor. Back emf is…

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Q: A motor has coils with a resistance of 25 Ω and operates from a voltage of 241 V. When the motor is…

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Q: A 120.0-V motor draws a current of 6.64 A when running at normal speed. The resistance of the…

A: Given value--- motor voltage = 120 V. current = 6.64 A. resistance of armature wire = .651 ohm. We…

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Q: what will be the value of I, just after the switch is closed 4Ω S 12V 7nF

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Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.