That's because the voltage in an

**alternating current**circuit is constantly changing. There are actually three ways you can**measure**voltage in an**AC**circuit. In most**AC**voltages, the peak-to-peak voltage is double the peak voltage. RMS voltage: The average voltage of the circuit; also called the mean voltage.Hereof, how do you measure current?

It is

**measured**in the unit of the Ampere, simply called “Amp,” (A). The most common**way to measure current**in a circuit is to break the circuit open and insert an “ammeter” in series (in-line) with the circuit so that all electrons flowing through the circuit also have to go through the meter.Can multimeter measure AC current?

In general, stick to DC circuits (the settings on the

**multimeter**with straight lines, not curvy lines). Most**multimeters can measure AC**(**alternating current**) systems, but**AC**circuits**can**be dangerous. A wall outlet with**AC**or 'main voltage' is the stuff that**can**zap you pretty good.Can we use DC ammeter to measure AC current?

By

**AC ammeters**if you mean Moving Iron type or Electrodynamo meter type then these**ammeters can**be used to**measure**both**AC**and**DC**, as the deflecting torque is either proportional to the square of the**current**or product of the**currents**respectively.