The nature of the gas also affects the potential difference.
The wire had a length of 760 cms., and the potential difference on its terminals was nearly 30 volts.
potential difference required to produce a Spark of given Length.
Throughout a wide range the deflections are proportional to the potential difference producing them.
The potential difference depends on the condition of the plant, and the season in which it may have been gathered.
Thus by measuring the potential difference between the ends of the two resistances successively, we may compare their resistances.
The potential difference between the two is recorded, and the potential gradient is thus found.
From equation we see that the current increases as the square of the potential difference.
At higher pressures the current rises far above these values and increases rapidly with the potential difference.
The connexion between the potential difference and the spark length has been made the subject of a large number of experiments.