Here is the "experiment" of today in the #Electromagnetism class: a tiny replica of the Leiden jar which is a far ancestor of the battery, consisting of a distribution of chargers trapped in in a glass container, which acts as a capacitor when the inner and outer conducting layers are reconnected again.

I used a voltmeter to detect the tiny residual voltage (0.4mV) produced across the bottle after the charging process.

#science #physics