options:
Increasing the distance between the coils
Increasing the distance between the coils
Increasing the number of coils
Increasing the number of coils
Increasing the thickness of the wire
Increasing the thickness of the wire
Adding batteries to the electromagnet
3 answers
The variable that does not increase the strength of an electromagnet is:
Increasing the distance between the coils.
Increasing the distance between the coils would actually decrease the strength of the magnetic field produced by the electromagnet, as the magnetic field strength diminishes with distance. The other options—adding more coils, increasing the thickness of the wire, and adding more batteries—can all contribute to a stronger electromagnet.
The situation described, where a girl slides down a plastic slide and her hair sticks up as she exits, is an example of Friction.
As she slides down the plastic, electrons are transferred from the slide to her hair (or vice versa), resulting in a buildup of static electricity due to the friction between the two materials. This causes her hair to stand up as it becomes positively charged and repels each other.
