Question

you can change the strength of a bar magnet with more or less electric current true or false

Answer 1

False. The strength of a bar magnet is primarily determined by the material it is made from and its magnetic properties, not by electric current. However, electric current can influence the strength of an electromagnet, which is a type of magnet created by the flow of electric current through a coil of wire. In that case, increasing the current will increase the strength of the electromagnet, but it does not change the strength of a permanent bar magnet.