In a series circuit containing a resistor and an inductor ...

[mia]

In a series circuit containing a resistor and an inductor connected to an ideal dc source and a switch, the inductor gets 40 of its maximum current 1.8 s after the switch is closed. What is the time constant of this circuit?
 
  A) 2.5 s B) 0.80 s C) 5.5 s D) 3.5 s E) 1.5 s

Question 2

Doubling the potential across a given capacitor causes the energy stored in that capacitor to
 
  A) reduce to one-half. B) double.
  C) quadruple. D) reduce to one-fourth.

[Sophiapenny]

Answer to Question 1

D

Answer to Question 2

C

[mia]

Excellent

[daiying98]

Gracias!