Question

A 10 m long wire that is fixed (stationary) carries a current I1 = 10 A to the right, as shown in the figure.

a) Find an expression for the intensity of the electric field generated by this long wire at the observation point with coordinates (0, -y0,0) in terms of the current I1 and y0.

b) What is the direction of the magnetic field generated by this wire? (Entering, leaving the page; right, left, up or down).

c) A much smaller wire of 10 grams and 2 cm in length, is placed parallel to the long wire as shown in the figure. The geometric center of the small wire is at the observation point with coordinates (0, -y0.0), where y0 = 5cm. Assuming that the magnetic field felt by the small wire has an intensity equal to that found in the previous paragraph, what must be the current (magnitude and direction that the small wire must take in order for its weight to be suspended due to the force of the field Magnetic generated by the long wire? (Remember that the current is made up of electrons).

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Answer 1

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