Question

Students attached both ends of a long wire to the poles of a battery and wrapped the wire around a spoon. In this arrangement, the spoon is able to pick up five paper clips. The students wrap more wire around the spoon and want to determine if the strength of the magnetic force has increased. Which of the following observations would indicate that wrapping more wire has increased the strength of the electromagnet?

A. More wire was needed to wrap around the spoon.
B. The spoon now picks up seven paper clips.
C. Eventually the battery runs out of energy.
D. The ends of the wire must touch the battery's poles.

Answer 1

Wrapping more wire around the spoon increases the strength of the electromagnet, which is indicated by the spoon picking up more paper clips.

Step-by-step explanation:

In this arrangement, wrapping more wire around the spoon would increase the strength of the electromagnet. The observation that would indicate this increase in strength is option B - the spoon now picks up seven paper clips. When more wire is wrapped around the spoon, it increases the number of coils in the wire, which increases the strength of the magnetic field. This increased strength allows the electromagnet to pick up more paper clips.