RC Circuits: A 2.0-?F capacitor that is initially uncharged is charged through a 50-k? resistor. How long does it take for the capacitor to reach 90% of its full charge?
A. 0.90 s
B. 0.23 s
C. 2.2 s
D. 2.3 s
Answer: B
You might also like to view...
The Sun's magnetic field is evident in the looped shapes of
a. solar flares. b. sunspots. c. the corona. d. granules. e. prominences.
A camera with a 20-cm diameter lens is recording images using a filter that allows only light of wavelength 600 nm to pass through
(a) What is the limit on the angular resolution (in microradians) in this case? (b) What is the diameter of the minimum-sized features that could be resolved on Mars with this camera? The distance to Mars at the time is 9.0 × 107 km.
Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the same direction. Jake's speed relative to the ground is
A) 6 m/s. B) 10 m/s. C) 14 m/s. D) none of the above
The monthly (30 days) electric bill included the cost of running a central air-conditioning unit for 2 hr/day at 5000. W, and a series connection of ten 60. W lightbulbs for 5 hr/day
How much did these items contribute to the cost of the monthly electric bill if electricity costs 8¢ per kW-h?