A capacitor of unknown capacitance C is charged to 100 V and then connected across an initially uncharged 60-?F capacitor. If the final potential difference across the 60-?F capacitor is 40 V, determine C
a. 49 ?F
b. 32 ?F
c. 40 ?F
d. 90 ?F
e. 16 ?F
c
You might also like to view...
(Choose all that apply.) An observatory in space could in principle detect
A) visible light. B) x-rays. C) infrared light. D) ultraviolet light. E) radio waves. F) gamma rays.
An ideal step-down transformer is needed to reduce a primary voltage of 120 V to 6.0 V. What must be the ratio of the number of turns in the secondary to the number of turns in the primary?
What will be an ideal response?
The top panorama shows our view of the Milky Way in all directions as it appears in visible light. The bottom panorama shows the same view, but in a different wavelength of light. What wavelength band are we seeing in the bottom photo, and how do you know?
A) infrared light, because the dust that appears dark in the visible light photo glows in infrared light B) x-ray light, because only x-rays allow us to see through the disk of our galaxy C) radio waves, because clouds of gas in the disk of our galaxy appear pinkish when we look at them with radio telescopes D) infrared light, because clouds of gas and dust appear pinkish when we look at them with infrared telescopes
What evidence from the careful examination of impact craters provides evidence that Mars had surface water long ago?
A) indistinct rims of many large craters due to water erosion B) lack of small craters which would have been erased by ancient rainfall C) channels where water once flowed between crater lakes D) all of these