Author Question: A single circular (radius = R) loop of wire is located in the yz plane with its center at the ... (Read 111 times)

silviawilliams41 · **on:** Jul 28, 2018

A single circular (radius = R) loop of wire is located in the yz plane with its center at the origin. The loop has a clockwise current as seen from the point (+R, 0, 0). The direction of the magnetic field at the point
a. (0, 0, 0) is -i and at the point (+R, 0, 0) is -i.
b. (0, 0, 0) is -i and at the point (0, +2R, 0) is -i.
c. (0, 0, 0) is +i and at the point (+R, 0, 0) is +i.
d. (0, 0, 0) is +i and at the point (0, +2R, 0) is +i.
e. None of the above

Question 2

A long wire carries a current of 3.0 A along the axis of a long solenoid (radius = 3.0 cm, n = 900 turns/m, current = 30 mA). What is the magnitude of the magnetic field at a point 2.0 cm from the axis of the solenoid? Neglect any end effects.
a. 34 mT
b. 64 mT
c. 30 mT
d. 45 mT
e. 4.0 mT