A decade box is connected in series along with a battery and an ammeter. The resistance of the decade box controls the amount of current in the series loop. As the resistance of the decade box gradually decreases, the current in the series loop gradually increases. That means the current through the battery gradually increases. This lab investigates the relationship between the voltage across the terminals of the battery in relation to the current flowing through the battery.
the results should verify the equation: V = ε - Ir
