The relationship between load resistance and internal resistance of power source is in a series connection, which is applicable to Ohm's law [ I=U/R; I-Current, U-Voltage, R- Resistance]; In other words, the larger the resistance, the higher the voltage.
What’s more, the terminal voltage is the voltage on the load resistance. When the power source EMF is invariant, the terminal voltage will increase with the increase of the load resistance.
