Suppose you electrically charge a transparency by rubbing it, and then hang the transparency, at rest, by a string in the center of a room. Except for the transparency and string, the room is totally evacuated of all matter
Neglecting any influences from outside the room, what kinds of fields would then be found at places inside the room but away from the transparency--for instance, at a point near a corner of the room?
A) an electric field only
B) a magnetic field only
C) Both an electric and magnetic field
D) No fields at all, because the transparency would create electromagnetic fields only within the transparency itself
E) No fields at all, because there is nothing [no material object] at such a point
A
You might also like to view...
The iron in our solar system was created from smaller mass atomic nuclei in ______
a. the Earth b. our sun c. Jupiter d. the Big Bang e. supernovas
Quasar's spectral lines are
A) emission lines with large red shifts. B) a continuum from the synchrotron radiation. C) fuzzy absorption lines from the merged light of the billions of stars. D) too complex for any interpretation. E) nonexistent, the gas so hot as to be totally ionized, so no lines are seen.
The internal energy of a system increases by 500 J while 610 J of work are performed on it. What was the heat flow into or out of the system?
A. -1110 J B. 1110 J C. -110 J D. 110 J
A 20.0 cm wrench is used to generate a torque at a bolt. A force of 50 N is applied perpendicularly at the end of the wrench. The torque generated at the bolt is
A. 8.0 N•m. B. 10 N•m. C. 14 N•m. D. 22 N•m. E. 37 N•m.