Question

question #18
the south pole of a magnet

1. will be attracted to the north pole of another magnet

will have no effect on another magnet
will be repelled by the north pole of another magnet
will be attracted to the south pole of another magnet

question #19
a single wire wrapped in a cylindrical soft - iron is called a(n)
electromagnet.
electric field.
circuit.
solenoid.

Explanation:

For Question #18: Opposite poles of magnets attract each other. So the south - pole of a magnet will be attracted to the north - pole of another magnet.
For Question #19: A single wire wrapped in a cylindrical core is called a solenoid. An electromagnet requires a source of current to be magnetized, an electric field is related to electric charges, and a circuit is a closed - loop for current flow.

Answer:

Question #18: Will be attracted to the north pole of another magnet
Question #19: Solenoid