Ohm's Law Lab — 3D Experiment
This is the textbook Ohm's-law experiment rebuilt as a precise 3D laboratory. The switch, rheostat, ideal ammeter and resistor form one series path, while the ideal voltmeter is connected only across the resistor. Each recorded setting adds a matched V–I point to the graph.
Bu simülasyon nasıl kullanılır
- Close or open the switch and adjust the rheostat to change the current
- Choose a 10 Ω, 15 Ω or 20 Ω resistor and vary the ideal DC supply
- Record individual meter readings or run the six-setting automatic experiment
- Orbit and zoom the 3D circuit to verify every meter connection
Nelere dikkat etmeli
- The ammeter sits in series and reads the same current that passes through the resistor
- The voltmeter's blue branch is parallel to the resistor and draws no current
- Every recorded point lies on a straight I–V line through the origin
- V/I remains equal to the chosen resistance at every rheostat setting
- The reciprocal graph slope agrees with the resistor value selected in the laboratory
Arkasındaki fizik
With negligible source resistance, an ideal ammeter and an ideal voltmeter, the series current is I = ε/(R + Rₕ). The voltmeter reads only the drop across the resistor under test, V = IR. Holding that resistor at 25 °C keeps R constant, so I is directly proportional to V. Plotting I vertically against V horizontally gives a straight line through the origin whose slope is ΔI/ΔV = 1/R; the reciprocal of the fitted slope therefore returns the resistor's value.