10. Magnetism self-eval q's (2nd exam)

Materials that can be magnetized are called:

ferromagnetic

Which of the following indicates the measurement of frequency for voltage or current?

hertz

Which one of the following sets of materials contain the most nonmagnetic materials?

silver, gold, copper, brass

Which of the following sets of materials contain the most magnetic materials?

steel, iron, nickel, cobalt

Which of the following best indicates the Law of Magnetism?

Unlike poles attract and like poles repel

Which of the following statements is correct about the Earth’s magnetic field?

The north pole, of a magnet/compass, points to the south magnetic pole of the Earth

Identify the correct geometry, or shape, of the magnetic field surrounding a single magnet.

c

Identify the geometry, or shape, of the magnetic field surrounding two unlike magnets.

a

Which one of the following models represents a non-magnetic material?

a

Which one of the following models represents a magnetic material?

e

The magnetic lines of force near a current carrying wire are:

circular in a plane, perpendicular to the wire

Magnetic fields are produced by:

motion of an electric charge

A generator produces electrical current by:

moving a coil of copper wire through a magnetic field

Moving a copper wire through a magnetic field produces:

flow of electrons

Which of the following explains why the force of a magnet decreases with distance?

inverse square law

If a magnet has a strength of 32 Newtons at 1 meter what is the force at 4 meters?

2 newtons

Which of the following is/are needed for an electric motor to work?

all of the above

Which of the following occurs in an electric motor works?

switching the flow of electric current in a magnetic field