The action that will NOT aid in making an electromagnet more powerful
winding more turns on the coil.
increasing the amount of current flow.
reversing the direction of current flow.
substituting a different type of coil material.
The most practical
field strength by passing more current through the field windings.
diameter of wire in the armature coil.
number of field poles.
A loop or single turn of wire on the armature of an ac generator
produces a continuously changing voltage during its rotation in the magnetic field.
Maximum voltage is produced when the loop sides are
cutting a maximum number of flux lines.
moving parallel to the direction of the field.
standing still at a position of maximum magnetic flux.
standing still at a position of minimum magnetic flux.
The property that enables a coil to develop an opposing voltage is
inductor is that the
applied voltage leads the current.
current leads the applied voltage.
current and applied voltage are in phase.
current and applied voltage are 180 degrees out of phase.