What do you expect when increasing the load resistance on a DC generator?

When you increase the load resistance on a DC generator, it's expected that the voltage drop across the load will increase. This relationship can be understood through Ohm's law, which states that voltage (V) is the product of current (I) and resistance (R), given by the formula V = IR.

When the load resistance is increased and the generator maintains a constant internal voltage, the current drawn from the generator decreases because load resistance is inversely proportional to current for a constant voltage. As the resistance increases, the load demand decreases, resulting in the total current flowing through the circuit dropping.

However, the voltage drop across the increased load resistance will increase because there's still a finite amount of voltage available from the generator. This increased load resistance means there is a higher potential difference across that resistance when current flows through it.

Thus, as load resistance increases, even with a decrease in total current, the existing voltage from the generator gets distributed across the load more significantly relative to the load resistance, leading to an increased voltage drop across the load itself.