resistance change in accordance with the present invention changes the voltage of the eyes can see that Ohm 's Law experimental electric relates to a circuit . Ohm 's law experimental electric circuit according to the present invention , the first and second experimental equipment and the internal resistance varies depending on the brightness of the light , and the power supply comprises a first and a second device for supplying power to the test apparatus . The first and second devices each experiment , including the light -emitting diode and a variable resistor connected in parallel , characterized in that it displays a change to the outside through the light emitting diode according to the voltage change in internal resistance . According to the present invention , any change in the resistance element by using a simple circuit diagram of the voltage change may cause the student's interest to be able to determine first hand the electrical phenomenon .
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