Thread: Electronics - Calculating charge

Hi everyone!

So here is my question:

The currents of the terminals in the terminals of the element in Fig. 1.5 (I attached a picture) is:

i = o, t < 0
i = 20 e ^-5000 t ≥ 0

Calculate the total charge (in microcoulombs) entering the elemnet at its upper terminal.

I am a bit confused because I know the forumla i = dq/dt, but I am not given any "t" here.

Can anyone help? Thank you very much!

Hey Nora314.

Is your equation meant to be i = 20*e^(-5000t)?

If so you probably want to find q(t) by integrating over the appropriate region of time.