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 magnetic 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 carry so that its weight is suspended due to the force of the magnetic field generated by the long wire? (Remember that the current is made up of electrons)

Z axis points off the page Alambre Largo X Alambre Corto (0,-y,0)

Answer 1