You are designing an ac generator with a maximum emf of 8.0 V. If the generator coil has 200 turns, each with a cross-sectional area of 0.030 m2,
what should be the frequency of the generator in a magnetic field of 0.030 T?
A) 7.5 Hz B) 7.1 Hz C) 44 Hz D) 8.0 Hz
B
You might also like to view...
Outgassing refers to the formation of an atmosphere by the attraction of gases from the surrounding nebula
Indicate whether the statement is true or false
The absorption lines in the infrared portion of the spectrum of a star that are produced by hydrogen are from the
a. Lyman series. b. Balmer series. c. Paschen series. d. isotopes of hydrogen. e. ions of hydrogen.
What do "forbidden" lines reveal about interstellar space?
A) The density or pressure of this gas is much lower than can be produced in a laboratory. B) The laws of physics are not the same in space as they are on Earth. C) There are unknown elements in space that do not correspond to elements found on Earth. D) There are molecules found in meteorites and interstellar dust that are not found on Earth. E) All of the above are true.
When there is electric current through an ionic liquid such as salty water, the moving charges are
A) only protons. B) only electrons. C) only negative ions. D) only positive ions. E) both positive and negative ions.