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 all the ways Malik can improve the strength of his
electromagnet

He can use a longer piece of wire that wraps more times around the bolt.

He can reverse the orientation of the battery.

He can replace the 1.5-volt battery with a battery of higher voltage.

He can replace the iron rod with a wooden rod

He can add a switch between the battery and the iron bolt.

(select all that apply)

All the ways Malik can improve the strength of his electromagnet are -

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current that consists of wire wound into a coil.

To increase an electromagnet strength following things can be done:

Thus,

All the ways Malik can improve the strength of his electromagnet are -

Learn more about:

link

I believe it would be these:

He can replace the 1.5-volt battery with a battery of higher voltage.

He can use a longer piece of wire that wraps more times around the bolt.

I'm not sure the others would work