A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to:A. hold the sheet there if it is magnetic.B. hold the sheet there if it is non-magnetic.C. move the sheet away from the pole with uniform velocity if it is conducting.D. move the sheet away from the pole with uniform velocity if it is both, non-conducting and non-polar.Choose the correct statement(s):

- A: Correct. If the sheet is magnetic (ferromagnetic), it will be attracted to the pole, requiring a force to hold it in place.B: Incorrect. A non-magnetic (and non-conducting) sheet won't experience a static force.C: Correct. If the sheet is conducting, moving it through the magnetic field induces eddy currents (Lenz's Law), which create a force opposing the motion. Thus, a force is needed to move it with uniform velocity.D: Incorrect. Non-conducting, non-polar materials don't experience electromagnetic forces during motion.