Renaldo and Nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. When they test the electromagnet, it can pick up 6 paper clips. Their teacher wants all groups to pick up at least 10 paper clips. What revisions could Renaldo and Nasreen make to increase the number of paper clips their electromagnet picks up?
Responses
A make the wire longermake the wire longer
B remove the nail from the center of the wireremove the nail from the center of the wire
C increase the number of loops of wire around the nailincrease the number of loops of wire around the nail
D spread the loops of wire apart on the nail so they do not touch