Motors ch1

Magnetism is used to produce most of the electricity consumed, devolop rotary motion in motors, and develop linear motion in solenoids

• True

• False

Three common naturally occurring magnetic metals are iron, nickel, and cobalt.

• True

• False

Common temporary magnets are horseshoe magnets, compasses, and bar magnets.

• True

• False

A more concentrated, or denser, magnetic Flux makes weaker magnetic force.

• True

• False

All magnets have a North pole and south pole.

• True

• False

A material is nonmagnetic if it has disorganized molecular domains so that the individual fields cancel each other

• True

• False

A common ferromagnetic material is copper

• True

• False

A common ferromagnetic material is copper

• True

• False

The magnetic field around a straight conductor is relatively weak and must be concentrated for use in an electric motor

• True

• False

The strength of a magnetic field is directly proportional to the number of turns in the coil and the amount of current flowing to the conductor.

• True

• False