the magnetic field from a coil is used to deflect an electron. The coil, which is being used in an electron beam experiment, has 200 turns and a radius of 13 cm. (a) What current is needed to produce a magnetic field with a magnitude of 5.010^?3T at the center of the coil? (b) (Figure 1) shows an electron being deflected as it moves through the coil. What is the direction of current in the coil?

1. A proton moving through the coil to the right is deflected toward the top of the page. What is the direction of the current in the coil?