The figure below shows a long straight wire just touching a circular loop carrying a current I1 = 2.14 A in the counterclockwise direction. Both lie in the same plane. (a) What direction must the current I2 in the straight wire have in order to create a magnetic field at the center of the loop in the direction opposite to that created by the loop?

A very long, straight wire carries a current of 0.29 A. This wire is tangent to a single-turn, circular wire loop that also carries a current. The directions of the currents are such that the net magnetic field at the center of the loop is zero. Both wires are insulated and have diameters that can be neglected. How much current is there in the loop?

An infinitely long wire carrying a current of I = 2.95 A is bent into the shape shown in the figure. The angle the arc subtends is e = 68.0° and the radius of the arc is 24.5 cm. Determine the magnitude and direction of the magnetic field at the point P which is at the center of the arc. (Let the +x direction point to the right, the +y direction point up, and the +z direction point out of the page.) magnitude direction --Select--- -Select--- +x

A rigid rectangular current loop abcd is in a uniform magnetic field. The magnetic field is 1.5T and in the y direction. The current is 2.0A and in the directions of blue arrows. The length of ab is 0.5 m and the length of ad is 0,8 m. For the coordinate, the r- and y-axis are along the horizontal and vertical direction on the paper, respectively, and the z-axis points out of the paper. (a) What are the magnitude and direction of the magnetic force on cach side of the loop? V B = 1.5T d I-2A .----------H Fah = direction = Fae = direction = Fad= direction = 0.5 m Fie = direction = (b) Based on your calculation of the magnetic forces, which of the following statements are true regarding the motion of the loop due to the magnetic forces? Explain your reasoning with one or two sentences. Use this rotation diagrams to identify a clockwise or counterclockwise rotation around horizontal (dashed line H) or vertical (dashed line V) axis. The rotation direction is viewed