A wire of length 0.45 m is conducting a current of 7.5 A toward the top of the page and through a B = 4.0 T uniform magnetic field directed into the page, as shown in the figure.  What is the magnitude of the magnetic force on the wire

An electron moves across Earth’s equator at a speed of 2.5 x 106 m/s and a direction 35o north of east.  At this point, Earth’s magnetic field has a direction due north, is parallel to the surface, and has a value of 0.1 x 10-4 T.  What is the magnitude of the force acting on the electron due to its interaction with Earth’s magnetic field?

Three infinitely long parallel wires carry currents /h = 400.0 A, 2= 300.0 A, and la = 500.0 A in the directions shown in the figure below, with separation distance d = 10.0 cm in the vertical direction. Iz a) What are the magnitudes and directions of the magnetic field at the location of each wire due to the other two wires? b) What are the magnitudes and directions of the magnetic force per unit length on each of the wires due to the other two wires? c) What is the mass per unit length of wire #2 if it is suspended at its location (i.e., the gravitational and magnetic forces on the wire are balanced)?

B 1m \1m 60° 60° 1m axis 1m 2m The wire has 5 segments each 1m and can rotate around the axis shown. The wire is placed in a magnetic field of 1.0 T magnitude, horizontal as shown in the figure. If the wire carries 1.0 A current, what are the magnitudes of the net magnetic force acting on the wire and the torque with respect to the axis? 6.92 N, 1.3 N.m 3.46 N, 1.3 N.m 0.0 N, 1.125 N.m 4.0 N, 1.125 N.m 4.0 N, 1.3 N.m None of them 3.46 N, 1.125 N.m 0.0 N, 0.0 N.m