1.if a current-carrying conductor has no magnetic force on it when placed in a c

Question

1.if a current-carrying conductor has no magnetic force on it when placed in a constant magnetic field,

a.the wire is parallel to the field.
b.the wire is perpendicular to the field.
c.the wire is at a 270º angle to the field.
d.the wire exerts a force on the field.
e.the torque on the wire is non-zero.



2.when two parallel current-carrying wires have currents in the same direction, the wires

a.attract one another.
b.repel one another.
c.exert no forces on one another.
d.exert equal and opposite repulsive forces on one another perpendicular to the plane of the wires.
e.exert equal and opposite attractive forces on one another perpendicular to the plane of the wires.



3.the head end of a nail is attracted to the north pole of a magnet and also to its south pole.

a.the nail is magnetized.
b.the nail is not magnetized.
c.the nail is aluminum.
d.the nail is copper.
e.the magnet is aluminum.

4.the head end of a nail is attracted to the north pole of a magnet and repelled by the south pole.


a.the nail is magnetized.
b.the nail is not magnetized.
c.the nail is aluminum.
d.the nail is copper.
e.the magnet is aluminum.



5.A charged particle moves in a circle in a plane perpendicular to a magnetic field. which statement best describes the work the field does on the particles?
a.work is done at a constant rate.
b.work is done at a decreasing rate.
c.work is done at a increasing rate.
d.the field does not do work on the particle.
e.work done on the particle is negative.

Explanation / Answer

1 A
2A

3B

4A

5D

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