A circular conducting loop lies in the xy plane of a certain reference frame. We are looking down on the loop with the +z axis pointing up at us, what kind of field actually pushes charge carriers around the loop (if current flows in the loop at all)?
A. The changing magnetic field.
B. An electric field.
C. No current flows in the loop.
B. An electric field.
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The image of an object beneath the surface of a medium of refractive index n> 1 is seen in air by a person looking down on the surface. This image, formed by light rays leaving the flat refractive surface, is
A. real and closer to the viewer than the object. B. virtual and closer to the viewer than the object. C. real and farther from the viewer than the object. D. virtual and farther from the viewer than the object. E. virtual and the same distance from the viewer as the object.
Only at the equator are all the stars visible over the course of the year
Indicate whether the statement is true or false
A modern geologic theory that considers Earth's lithosphere to be made up of moving plates is known as
a. the principle of uniformity. b. the law of superposition. c. the Moho concept. d. plate tectonics.
An atom with 6 protons and 6 neutrons is a carbon atom, and an atom with 6 protons and 7 neutrons is also a carbon atom.
Answer the following statement true (T) or false (F)