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Electrical quantities like voltage and current are measured for three simple circuits to demonstrate the fundamental laws governing electrical circuits:

- Ohm’s law
- node laws
- circuit laws

For each circuit, a graph allows us to follow the development of current intensity as a function of voltage for different values of resistance.

**Move** the voltage and resistance tabs to change their values.

- To understand Ohm’s Law.
- To understand the law of the circuit nodes and the laws governing electric circuits.

The **simple circuit **consists only of a variable resistor and a DC source. The voltmeter measures the voltage across the resistor. The ammeter measures the current flowing through the circuit. The…