4. Two wires carry currents of 2.0 A. They cross at right angles as shown in Figure 2. Answer the following questions, which should require no calculations. (a) At which points, if any, does the total magnetic field have the same value? (b) At which points, if any, is the magnetic field zero? (c) At which point does the magnetic field have the largest magnitude? (5) I = 2.0 A begundo ad no B dT 7.0 cm old 7.0 cm C D 7.0 cm bits d) 7.0 cm 7.0 cm A A 7.0 cm (d) P- (s) 6.0 cm P Figure 2 7.0 cm I = 2.0 A wire