RC Circuits: A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about this circuit?
A. The charge on the capacitor after four time constants is about 98% of the maximum value.
B. The charge on the capacitor after one time constant is 50% of its maximum value.
C. The charge on the capacitor after one time constant is 1/e of its maximum value.
D. The voltage on the capacitor after one time constant is 1/e of the maximum value.
E. The voltage on this capacitor after one time constant is 100% of its maximum value.
Answer: A
You might also like to view...
When it is winter in the northern hemisphere, it is ____ in the southern hemisphere
a. winter b. summer c. spring d. fall
Star X has an apparent magnitude of 3, and star Y has an apparent magnitude of 8. What can we conclude?
A) Star X appears brighter in the night sky than star Y. B) Star Y appears brighter in the night sky than star X. C) Star X is farther away from us than star Y. D) Star Y is farther away from us than star X.
A dark cloud can be detected if it happens to block the light emitted by more distant stars
Indicate whether the statement is true or false
A glass plate whose index of refraction is 1.57 is immersed in a liquid. The surface of the glass is inclined at an angle of 54° with the vertical. A horizontal ray in the glass is incident on the interface
The liquid is an oil whose index of refraction is 1.40. The incident horizontal ray refracts at the interface. The angle that the refracted ray, in the oil, makes with the horizontal is closest to: A) 11° B) 5.6° C) 8.3° D) 14° E) 17°