Equal but opposite charges Q are placed on the square plates of an air-filled parallel-plate capacitor. The plates are then pulled apart to twice their original separation, which is small compared to the dimensions of the plates
Which of the following statements about this capacitor are true? (There may be more than one correct choice.)
A) The capacitance has doubled.
B) The electric field between the plates has increased.
C) The energy stored in the capacitor has doubled.
D) The energy density in the capacitor has increased.
E) The potential difference across the plates has doubled.
C, E
You might also like to view...
A 2000 kg car is traveling on a banked curved icy road without sliding. The velocity of the car is 30 m/s and the road is banked at an angle of 20.0 degrees. The radius of curvature of the road is
A. 175 m. B. 204 m. C. 252 m. D. 302 m. E. 375 m.
Which of the following material types absorb all wavelengths of photons?
(a) Metals (b) Semiconductors (c) Dielectrics (d) Free atoms
A large cylindrical water tank is mounted on a platform with its central axis vertical. The water level is 3.75 m above the base of the tank, and base is 6.50 m above the ground. A small hole, 2.22 mm in diameter, has formed in the base of the tank
Both the hole and the top of the tank are open to the air. We can ignore air resistance and treat water as an ideal fluid with a density of 1000 kg/m3. (a) How many cubic meters of water per second is this tank losing? (b) How fast is the water from the hole moving just as it reaches the ground?
In ancient times, constellation boundaries were well defined
a. True b. False Indicate whether the statement is true or false