Two concentric, circular wire loops of radii r1 = 18.7 cm and r2 = 26.3 cm, are located in an xy plane; each carries a clockwise current of 7.45 A (see the figure below). (a) Find the magnitude of the net magnetic dipole moment of the system. (b) Repeat for reversed current in the nner loop. T2

Two coplanar and concentric circular loops of wire carry currents of I, = 5.10 A and I, = 2.90 A in opposite directions as in the figure below. (a) If r, = 12.0 cm and r, = 8.80 cm, what is the magnitude of the net magnetic field at the center of the two loops? (b) If r, = 12.0 cm and r, = 8.80 cm, what is the direction of the net magnetic field at the center of the two loops? O out of the page O into the page O toward the top of the page O toward the bottom of the page (c) Let r, remain fixed at 12.0 cm and let r, be a variable. Determine the value of r, such that the net field at the center of the loop is zero. cm

A long straight wire carries 4A out of the page as pictured. A -10 µC particle, 2cm away from the current, travels upwards at a speed v = 2x106 m/s. (a) Calculate the magnetic field B, in components, at the location of the charge. (b) Calculate the magnetic force (vector) on the particle. a W

The current in a long, straight conductor has the following form:I(t) = I0cos ωtWhat is the magnitude of the magnetic field a distance r away from theconductor?