A battery of constant voltage is connected to a variable resistor. As the resistance of the resistor increases, what happens to the voltage? What happens to the current?

The electric current amount will vary according to the resistance value when connected to a voltage of a power supply. If resistance is reduced, current will increase. So, if the resistance is infinite (open circuit), the current could be considered zero, or infinitesimal small, if the resistance is zero (of infinitesimal small), the current will tend to be the maximum the power supply can provide. Here is the case of the power supply capability, input resistance, capacity to hold and regulate the output voltage to a certain maximum current, etc. Normally when you short circuit (zero ohms resi

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.