A coil of wire is connected to a galvanometer. When a bar magnet is
moved in and out of the coil, the galvonometer records a current. The
current results because:
a. the coil acts like a transformer
b. the changing magnetic field induces an electric field in the wire
c. an electromagnetic field is generated
d. the wire is ferromagnetic
e. none of the above

Hello once again Answer123.

The answer to this one is b; the current results because the changing
magnetic field induces an electric field in the wire.  This is the
basis of Faraday’s law.

Faraday's law states that “the induced electromotive force in the
conductor is directly proportional to the time rate of change of the
magnetic field.”

Please request clarification if you would like additional information.

Googlenut


References:

Texas Tech University Physics Department
http://www.phys.ttu.edu/~batcam/Courses/1307/Labs/Unit16Lab.htm

Department of Physics, Southern Methodist University
http://www.physics.smu.edu/~coan/1314/labs/induction.doc

Astronomical Society of the Pacific
http://www.aspsky.org/education/tnl/35/fields.html


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