Experiment 6 - Correct Voltage Measurement

If you want to simultaneously measure voltage and current, you need to consider that there are two possibilities. Here and you look first at the so called correct voltage measurement.

There are basically two circuits to connect two real measuring instruments in order to simultaneously measure the current and voltage across the load resistor R_L...

Circuit diagram correct voltage measurement of a load resistor.

Circuit correct voltage measurement of a load resistor. (Enlarge)

In the correct voltage measurement, the voltmeter displays the actual voltage at the load resistor R_L. The ammeter however, shows a value too high. It shows the total current through R_L and R_iV!

In the next experiment, you look at the correct current measurement...