For #33 and #34, write true or rewrite the italicized part to make the statement true. 37. A 25.5-m wire moves perpendicular to a magnetic field of 4.42 x 10* T at a speed of 14.4 33. The speed of an electric motor can be controlled by varying the frequency at which the m/s. What EMF is induced in the wire? current alternates . 34. When two parallel wires carry currents in opposite directions, their magnetic fields attract each other. 38. An AC generator develops a maximum EMF of 5.00 x 102 V. What is the effective EMF delivered to an external circuit? 35. The magnetic force on a current-carrying wire in a magnetic field is the direction of the current. cd opposite c. perpendicular to parallel to d. the same as 38. 36. In a magnetic material, the act like tiny electromagnets. atoms c. protons electrons d. neutrons 39. A step-up transformer has 350 turns on the primary coil and 1500 turns on the secondary coil. The primary coil has a potential difference of 110 V across it. The current in the secondary circuit is 15.0 A. What is the current in the primary circuit? 36