Use the diagram below to answer the following question:
image e0200808b8fa436fae6f573f2546fa05
Which procedure step could the student follow to make the magnetic force exerted by the electromagnet greater?
(1 point)
Responses
increase the length of wire at location 1
increase the length of wire at location 1
open the switch at location 2
open the switch at location 2
add more batteries in series at location 3
add more batteries in series at location 3
reduce the number of wire turns at location 4
reduce the number of wire turns at location 4