RLC Circuit (with critical and heavy damping)

[JNBirDy]

Homework Statement

Consider a RLC circuit.

a) Suppose the parameters are chosen to give critical damping. The capacitor is charged to a voltage of V₀ and at time equal to zero the switch is closed. Find the time at which the magnitude of the current reaches a max, and find the value of the current at that time.

b) Consider the case of very heavy damping. Show that the charge on the capacitor declines approximately as e$^{-t/τ}$, where the τ (relaxation time) is approximately equal to RC.

Homework Equations

L(dI/dt) + RI + q/C = 0

τ= L/R

γ = R/L

Q = (1/R)√(L/C)

The Attempt at a Solution

Not sure how to start, any help is appreciated.

 

[SammyS]

Find out what critical & heavy damping are.