1.Which of these is NOT a part of an electromagnet? * a. conductive wire (usually copper)
b. a piece of iron
c. a voltage source
d. a magnet
2.What is a device that creates a magnetic field through the application of electricity? *
a. Magnet
b. Electric Current
c. Electromagnet
d. Voltage source
3.Which statement below best describes how an electromagnet works? *
a. The electrons flowing through the coiled wire creates a magnetic field magnetizing the iron core as if it were a permanent magnet.
b. The electrons flowing through the iron core create a magnetic field around the coiled wire is if it were a permanent magnet.
c. The electrons flowing in the battery create a magnetic field around the coiled wire, magnetizing the iron as if it were a permanent magnet.
d. The magnetic field around the magnet, magnetized the iron as if it were a permanent magnet.
4.How is an electromagnet different from a permanent magnet? (Check all that apply) *
a. It can be turned on or off.
b. It is powered by a voltage source.
c. Its strength can be varied.
d. it's poles can be reversed.
e. It has a north and south pole.
f. The domains of the iron are aligned.