Mr. Barnes class did an experiment testing electromagnetic strength. As the results show; they discovered that the more coils they used; the stronger the magnetic strength. Which lab design did they use?
A) They created a closed circuit to attract paper clips using a copper wire coiled around an iron nail. The copper wire was also touching only the negative pole of a D- Battery.
B) They created a closed circuit to attract paper clips using a copper wire coiled around a pencil. The copper wire was also touching both the positive and negative poles of a D- Battery.
C) They created a closed circuit to attract paper clips using a copper wire coiled around an iron nail. The copper wire was also touching both the positive and negative poles of a D- Battery.
D) They created a closed circuit to attract paper clips using a insulated wire coiled around an iron nail. The insulated wire was also touching both the positive and negative poles of a D- Battery.