6. Indicate on each diagram the direction of the electric current, and the north and south poles of the coil. (a) (b) 7. Each empty circle represents a compass near one end of a coiled conductor. Label the ends of the coils N or S, and show the direction of the compass needle in each case. (a) (b) O (X X X (X compass conductor 8. Determine the polarity of the poles of the electromagnet