The commutator in a direct-current motor:
a. starts the loop rotating.
b. holds the loop steady.
c. allows the motor to run on alternating current from a standard wall socket.
d. keeps the current flowing in the same direction through the coil.
e. reverses the direction of electric current through the coil.
e
You might also like to view...
Lower compression values lead to a greater loss of image data.
Answer the following statement true (T) or false (F)
An electric current produces
A) a gravitational field. B) an electric field. C) a magnetic field. D) an electromagnetic field. E) a universal field.
Polarization: Unpolarized light passes through three ideal polarizing filters. The first filter is oriented with a horizontal transmission axis, the second one has its transmission axis at 30° from the horizontal, and the third filter has a vertical transmission axis. What percent of the light gets through this combination?
A. 9.4% B. 91% C. 50% D. 0% E. 33%
What is the importance of the carbon dioxide (CO2 ) cycle?
A) It makes the growth of continents possible. B) It allows for an ultraviolet-absorbing stratosphere. C) It regulates the carbon dioxide concentration of our atmosphere, keeping temperatures moderate. D) It will prevent us from suffering any consequences from global warming.