Compare the expressions for the energy stored in an inductor and the energy stored in a capacitor. Select the choices that explain the similarities indicated by the two expressions.

a. Calculating the energy stored in each device involves multiplying by a factor of 1/2.
b. The expressions are equivalent because LC= Δt^2
c. The proportionality constant used in each expression is determined by the physical properties of the circuit element.
d. The energy stored in each device is directly proportional to the square of a quantity involving charge.
e. The energy stored in each device is directly proportional to a quantity related to current.
f. Each device stores an amount of energy that is inversely proportional to the physical dimensions of each device.