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A rectangular coil with resistance R has N turns, each of length scripted l and width 'w' as shown in Figure. The coil moves into a uniform magnetic field vector B with constant velocity vector v. What are the magnitude and direction of the total magnetic force on the coil for the following situations? (Use the following as necessary: N, B, w, v, and R.)

(a) The coil enters the magnetic field.
F =   [Direction?]
(b) The coil moves within the field.
F =   [Direction?]
(c) The coil leaves the field.
F = [Direction?]

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Ankit Lal
Ankit LalLv10
15 Oct 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Figure P19.64 is a setup that can be used to measure magnetic fields. A rectangular coil of wire contains N turns and has a width w. The coil is attached to one arm of a balance and is suspended between the poles of a magnet. The field is uniform and perpendicular to the plane of the coil. The system is first balanced when the current in the coil is zero. When the switch is closed and the coil carries a current I, a mass m must be added to the right side to balance the system. (a) Find an expression for the magnitude of the magnetic field and determine its direction. (b) Why is the result independent of the vertical dimension of the coil? (c) Suppose the coil has 50 turns and a width of 5.0 cm. When the switch is closed, the coil carries a current of 0.30 A, and a mass of 20.0 g must be added to the right side to balance the system. What is the magnitude of the magnetic field? 

Figure P19.64 is a setup that can be used to measure magnetic fields. A rectangular coil of wire contains N turns and has a width w. The coil is attached to one arm of a balance and is suspended between the poles of a magnet. The field is uniform and perpendicular to the plane of the coil. The system is first balanced when the current in the coil is zero. When the switch is closed and the coil carries a current I, a mass m must be added to the right side to balance the system. (a) Find an expression for the magnitude of the magnetic field and determine its direction. (b) Why is the result independent of the vertical dimension of the coil? (c) Suppose the coil has 50 turns and a width of 5.0 cm. When the switch is closed, the coil carries a current of 0.30 A, and a mass of 20.0 g must be added to the right side to balance the system. What is the magnitude of the magnetic field? 


A conducting coil consisting of nturns of wire is placed in a uniform magnetic field of magnitude B= 1.69 T oriented in the positive y direction as shown in thefigure. The radius of the coil is R = 4.03 cm, and the anglebetween the magnetic field vector and the unit normal vector to thecoil is θ = 60.0°. The current through the coil is i = 3.75A.
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b) If the radius of the loop is decreased to R = 2.23 cm, whatshould the number of turns, N, be for the torque to remainunchanged? Assume that i, B, and θ stay the same.

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