Ohm’s Law: Series Cells with Nichrome Wire

The simulation reproduces the classic Ohm’s law experiment from NCERT Class 10. A nichrome wire is placed in a single loop with a key, an ammeter in series and a voltmeter across the wire. One to four 1.5 V cells can be added in series to supply the circuit. When the key is closed, the current and voltage are displayed on the meters.

Students can change the number of cells using the provided control and observe how the ammeter reading (current) and voltmeter reading (voltage across the wire) vary. By recording the values for each cell count, they can plot a V‑I graph and see that the points lie on a straight line through the origin, confirming that V/I remains constant.

Through this activity learners discover that the constant slope of the V‑I line is the resistance of the nichrome wire, reinforcing the relationship V = IR and the concept of resistance being independent of the source’s internal resistance in this idealised setup.