A single circular (radius = R) loop of wire is located in the yz ...

[silviawilliams41]

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

[Jevvish]

Answer to Question 1

A

Answer to Question 2

D

[silviawilliams41]

Excellent

[vickyvicksss]

Gracias!