As a charged particle moves freely in a circular path in the ...

[ap345]

As a charged particle moves freely in a circular path in the presence of a constant magnetic field applied perpendicular to the particle's velocity, the particles kinetic energy
  1.remains constant.
  2.increases.
  3.decreases.

Question 2

A square and a circular loop with the same area lie in the xy-plane, where there is a uniform magnetic field pointing at some angle q with respect to the positive z-direction. Each loop carries the same current, in the same direction. Which magnetic torque is larger?
  1.the torque on the square loop
  2.the torque on the circular loop
  3.the torques are the same
  4.more information is needed

[joneynes]

Answer to Question 1

1

Answer to Question 2

3

[ap345]

Thank you!

[joneynes]

Always glad to help...