How many amperes does a 1500-watt heater draw if connected to a 120-volt supply?

To determine the current drawn by a 1500-watt heater connected to a 120-volt supply, you can use the formula derived from Ohm's Law, which states that power (in watts) is equal to voltage (in volts) multiplied by current (in amperes). This can be expressed mathematically as:

Power (P) = Voltage (V) × Current (I)

Rearranging this formula to find the current gives us:

Current (I) = Power (P) / Voltage (V)

Substituting the known values into the formula:

I = 1500 watts / 120 volts

Calculating this gives:

I = 12.5 amperes

Therefore, a 1500-watt heater connected to a 120-volt supply draws 12.5 amperes. This calculation aligns with the principles of electricity, where the relationship between power, voltage, and current is fundamental in understanding how electrical devices operate.