Why do you think the number of loops in the coil is important? If we had only a

Question

Why do you think the number of loops in the coil is important? If we had only a couple of loops instead of more than 10, how would the force on the coil change? Remember that the force depends on the amount of charge moving in one direction.

Measure a length of wire about 3?4 feet  long. Wrap the wire around a small cylindrical object, such as a C?size

battery. Make a coil of 15 turns around the cylinder. Finish the coil by wrapping around opposite sides of the

ring to secure everything in place (Figure 7 middle). Leave 4 cm tails coming off both sides to function as an

axle that rests on your paperclips.

Hold the coils vertically as if you were standing the circle on end. and rest one axle tail on a flat surface

(something that is okay to scratch). Using scissors scrape only one side of the insulation from one tail, and all

the insulation from the other (Figure 7 right). The half?scraped side will mimic the commutator and brushes on

a more complicated motor, only allowing current to flow through the non?insulated side.

Explanation / Answer

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