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Kirchhoff's Law » Physics » Electricity » Kirchhoff's Laws » Let's go... » Experiment 3 - Voltage

Experiment 3 - The Voltage in the Circuit

Measurement of the voltage U1. (Enlarge)

Measurement of the voltage U2. (Enlarge)

Measurement of the voltage U3. (Enlarge)

Build it on the circuit shown. You measure the voltage U at three different points in the circuit.

At these three points you measure voltages of...

U1 = 9 V, U2 = 4.5 V, U3 = 4.5 V

Here you realize...

U1 = U2 + U3

In other words, in a closed circuit the voltage at the source (battery, U1) drops entirely on its way through the circuit (U2 und U3).

Circuit diagram measurement of the voltage in the circuit.

In the next experiment, you look at a circuit with junctions...