a. battery, a nail, and a magnet
b. battery, some wire, and a nail
c. loop of wire, contacts, and a battery
d. magnet, a nail, and some wires
e. none of the above
2) Changing a magnetic field in the presence of a circuit results in which of the following?
A.An induced current in the circuit
B.Magnetizing the circuit
C.Added resistance in the circuit
D.Increasing the electrons in the circuit
3) When a magnetic field is changed either in direction or magnitude, a/an___________field is produced
a. magnetic
b. electric
c. gravitational
d. resistance
4)An electric motor and an electric generator are
a.Entirely different devices
b.Very similar devices
