40. The current is least in a rotating loop when the loop's motion is the magnetic field. A. slow and perpendicular to B. slow and parallel to C. fast and perpendicular to D. fast and parallel to 41. A rod with a positive charge is placed near an uncharged metal sphere. If the charged rod is first removed and the ground is then broken, will the sphere look like Figure A, B, or C? + + + A. The sphere will look like Figure A because the excess electrons will drain to the ground, and the sphere will become neutral. B. The sphere will look like Figure B because the excess of positive charges that it gained when it was grounded. C. The sphere will look like Figure C because it is left with the negative charges that it gained when it was grounded. D. none of the above 42. If a magnetic field points upward and the current is to your left, the force is A. toward you B. to your right C. away from you D. to your left 43. When a potential difference is applied across crystals that have they deform. A. capacitance B. piezoelectricity C. magnetism D. ionization 44 are used to store electrical energy. A. volt B. capacitors C. conductor D. electric field