So the frequency in the power grid is 50 - 60 Hz depending on country's electrical standard. If I have a ~2000 watt heater that runs on 220 volts ~ 9 amps at 50 Hz, would increasing or decreasing the frequency effect the power output of the device. For example if I make the device run at 75 Hz without changing voltage or current would the output power of the device be increased. I haven't learned any mathematical expressions involving frequency when calculating power (W = I * V). If anyone could provide such it will be helpful.