A simplified model of an electromagnet is shown here, where a loop of wire is placed around an iron nail. The wire is connected to a battery. A student wants to test the strength of the electromagnet by measuring how many paperclips
the electromagnet can pick up. In order to increase the strength of the electromagnet, some modifications to the
apparatus can be made. Which questions are most relevant to increasing the strength of the electromagnet? Select
ALL that apply.
A)
Will wetting the nail increase the number of paperclips that can
be picked up?
B)
Does insulating the nail increase the number of paperclips that
can be picked up?
C)
Does increasing the current in the battery increase the number of
paperclips that can be picked up?
D)
Will increasing the number of loops of wire around the nail
increase the number of paperclips that can be picked up?
E)
Will positioning the loops of wire closer together on the nail
increase the number of paperclips that can be picked up?
Forces in Nature