Two questions:
1) I was wondering, when do I use the AC mode on the Ammeter? Perhaps what I mean is, what does this mode show?
Suppose we have V(t)=V.sin(t), a sine wave in other words, which we want to measure; what would the reading be telling us? The peak voltage V? rms? If rms, can someone explain to me what this means.
2) I have a 7805 connected to a motor via another device. The motor is using PWM, which are square waves. The period of these waves are about 100ms. If I want to measure the current output from this 7805 while the motor is running under this PWM signal, should I be using the AC mode, or the DC mode?
Many thanks.