# Current vs. Time in AC Current

• Benjamin_harsh

#### Benjamin_harsh

Homework Statement
Current Vs Time in AC Current.
Relevant Equations
Current Vs Time in AC Current.
I always find voltage vs time majorly in case of AC current. What about current V time in AC current cases?

One can plot current versus time, certainly.

For a purely resistive load (an AC power source driving current through a resistor), how does current relate to voltage?

One can plot current versus time, certainly.

For a purely resistive load (an AC power source driving current through a resistor), how does current relate to voltage?
So how current stays same while voltage repeatedly fluctuates in AC current?

So how current stays same while voltage repeatedly fluctuates in AC current?
Current does not stay the same in this situation.

If you are measuring a fluctuating voltage, you should be working to measure a fluctuating current.

If you are measuring an average (for instance, a root mean square average) voltage then you should be working to measure an average (for instance, a root mean square average) current.

Note that multiplying RMS voltage by RMS current is not guaranteed to yield RMS power. Hence the notion of a power factor. [That was a serious learning moment when I first encountered that -- those power engineering dudes face interesting challenges. Some of them hang out here]

Last edited:
rsk