**Description**:

Voltage is mesured using a low frequency generator. The reading of the voltmeter will vary.

**1.** Every ten seconds, read the value of the voltage. Write measurements in the table.

To help you, a red light will flash every 10 s.

Do not forget the "-" sign. The unit used is volts which is already shown in the table heading.

**2.** Click on the arrow to go to the next page. Put the points on a graph of V = f (t).

**Definitions**

__AC current__: Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction.

Alternating currents are accompanied (or caused) by alternating voltages. An AC voltage v can be described mathematically as a function of time by the following equation:

*v*(*t*) = *V*_{peak} sin(*ωt*)