As more resistors are added in series to a constant voltage source, the power supplied by the source
A) increases.
B) decreases.
C) does not change.
D) increases for a time and then starts to decrease.
B
You might also like to view...
If you view a distant light source through a narrow gap between your fingers, you will see [if you do the experiment properly]
A) Donald Duck. B) alternating bright and dark lines running perpendicular to your fingers, due to interference between light waves. C) alternating bright lines and dark lines running parallel to your fingers, due to interference between light waves. D) the entire gap is dark, due to destructive interference between light waves. E) the entire gap is bright [or light], due to constructive interference between light waves.
The sun's energy output is a maximum in the visible region of the spectrum. One biological reason we might expect or predict this fact is that
A) it would be impossible for biological photosynthesis to occur if any other region dominated the solar spectrum, and thus plant life could not exist on Earth. B) the visible region comes right in the middle of the overall electromagnetic spectrum. C) visible radiation is the only type of solar radiation with enough energy to actually burn our skin. D) the human eye would be expected to evolve in such a way as to make use of the sun's main energy output. E) the visible region has the highest frequency.
What is the maximum efficiency of a heat engine operating between 293 Kelvins and 273 Kelvins, the temperatures at the surface and several hundred meters below the surface, respectively, of the ocean?
The addition of salt to water affects its
A) crystal composition. B) freezing point. C) viscosity. D) liquidity. E) none of the above