A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer 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 wave is generated.
d. the wire is ferromagnetic.
e. none of the above
b
You might also like to view...
The strength of low-carbon steel used in automobile bodies is achieved by ______________forming.
Fill in the blank(s) with the appropriate word(s).
A p-type semiconductor is produced in polyacetylene by doping with:
(a) Boron (b) Aluminum (c) Fluorine (d) Lithium
If sufficient force is applied to a crystal, it can be permanently deformed. Permanent deformation in metal crystals occurs due to atomic displacements on the planes that are most closely packed, and it happens in the most closely packed directions. Assume that a force is applied to a crystal of FCC copper that permanently stretches the crystal in the [001] direction. The (111) plane is one of the close-packed planes in FCC copper on which permanent deformation could occur.
(a) What is the angle between the [001] direction and the normal to the (111) plane? (b) Atom displacements along which close-packed directions within the (111) plane could contribute to the permanent deformation of the crystal in the [001] direction?
Very massive stars lose their outer layers in a planetary nebula
a. True b. False Indicate whether the statement is true or false