The diagram shows a simple d.c. electric motor which is rotating. Which change makes the motor rotate more quickly?
In a DC motor, the device which is used to change the direction of current through the coil after every half rotation is called ___.
Question 6 Commercial electric motors do not use (a) an electromagnet to rotate the armature (b) effectively large number of turns of conducting wire in the current carrying coil (c) a permanent magnet to rotate the armature (d) a soft iron core on which the coil is wound
Does the electric motor rotate continuosly in one direction or does the shaft change its direction in every half rotation?