(a) What is the direction of the emf induced in the rod? (b) Find the magnitude of the emf induced in the rod. (c) Find the rate at which thermal energy is being generated in the rod.

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

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Q: An MRI technician moves his hand from a region of very low magnetic field strength into an MRI…

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Q: A solenoid has 600 turns, a 3cm diameter and a length of 95cm. (a) If this solenoid carries an 8A…

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Q: If the current running through an inductor is increased by a factor of 3, by how much does the…

A: Given:- The  current running through an inductor is increased by a factor of 3 Find:- how much…

Q: A motor has coils with a resistance of 26 and operates from a voltage of 237 V. When the motor is…

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Q: A 48 turn conductive loop encloses an area of 71 m 2 At what constant rate should the magnetic field…

A: Given, Number of turns N = 48  Area A = 71m2 emf ε=3.58 Volts   We know the expression for induced…

Q: What direction of the magnetic field causes a counterclockwise direction of induced emf on the…

A: According to Lenz law, The direction of the induced emf that drives current around a wire loop is…

Q: A four pole machine generates 250V when operated at 1500rpm. If the flux per pole is 1.085x10^6…

A: In this case, a four-pole machine generates some voltage while operated at a certain speed. The…

Q: The magnetic flux through each turn of a 210-turn coil is given by B = 9.25 x 10-³ sin(at), where is…

A: Given: The number of turns is 210. The magnetic flux is. ϕB=9.25×10-3sinωt…

Q: motor has coils with a resistance of 42.0 Ω and operates from a voltage of 240 V. When the motor is…

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

Q: conducting rod with length of 20cm is pulled along the a rotated U-shaped (see the figure)…

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Q: (A) What is the current in the circuit the moment after the switch S is closed? (B) What is the…

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Q: The figure shows a copper rod moving at a velocity of 7 m/s parallel to a long straight wire…

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Q: An MRI technician moves her hand from a region of very low magnetic field strength (B=0) into an MRI…

A: Given data- magnetic field B=1.55 T diameter D=2.55 cm so radius r=1.275 cm =1.275*10-2 m time…

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…

Q: A coil (N=300 turns; A=0.1 m2) is placed in a magnetic field B=0.5 T such that Ө changes from 90…

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Q: the emf of a coil rotating in a magnetic field is zero at t = 0 and increases to its first peak at t…

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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.