The motor we built in lab is a DC (direct current) motor. We designed the motor loop so the current turns on and off at the right time so the coil turns in only one direction. If we remove all the varnish on both ends of the wire then the current is always on and the coil only oscillate back and forth in the external field, True False QUESTION 2 Voltage can be induced in a wire by moving the wire ncar a magnet moving a magnet near the wire. º both of the above none of the above QUESTION 3 Current is induced in a coil when there is a change in electromagnetic polarity. magnetic field intensity in the coil. electric field intensity in the coil. QUESTION 4 What factor(s) can be changed to increase the loudness of the note card speaker?