Malik built a simple electromagnet with copper wire, an iron bolt, and a 1.5-volt battery. The electromagnet was able to lift a paper clip from 3 centimeters away. Select three ways Malik can improve the strength of his electromagnet. Choose the 3 correct answers.
a
He can use a thicker piece of copper wire.
b
He can reverse the orientation of the battery.
c
He can replace the iron rod with a wooden rod.
d
He can replace the 1.5-volt battery with a battery of higher voltage.
e
He can use a longer piece of wire that wraps more times around the bolt.
The correct answers are:
a. He can use a thicker piece of copper wire.
d. He can replace the 1.5-volt battery with a battery of higher voltage.
e. He can use a longer piece of wire that wraps more times around the bolt.