In a purely resistive AC circuit where 240V is applied across a 10-ohm resistor the amperage is?

Since Ohm's law states that current is voltage divided by resistance, if you place 240 volts across 10 ohms, you will get 24 amperes. This is true for AC and DC. It is also true for inductive or capacitive circuits, except that the calculation of apparent resistance (reactance) and phase angle of current to voltage becomes more complex.