To determine which appliance would use less electricity to bake a pizza, you need to consider both the voltage (V) and the current (I) drawn by each appliance. Electricity usage is measured in kilowatt-hours (kWh), and the formula to calculate electricity consumption is:
Electricity Consumption (kWh) = Power (kW) x Time (hours)
To calculate the power (P) in kilowatts (kW) for each appliance, you can use the formula:
Power (kW) = Voltage (V) x Current (A) / 1000
Let's do the calculations for each appliance:
Toaster Oven: Voltage (V) = 120 volts Current (I) = 14 amps Power (P) = 120 x 14 / 1000 = 1.68 kW
Oven: Voltage (V) = 120 volts Current (I) = 12 amps Power (P) = 120 x 12 / 1000 = 1.44 kW
Now, let's assume you want to bake the pizza for 30 minutes (0.5 hours):
Electricity Consumption for Toaster Oven = 1.68 kW x 0.5 hours = 0.84 kWh Electricity Consumption for Oven = 1.44 kW x 0.5 hours = 0.72 kWh
Based on these calculations, the oven would use less electricity to bake a pizza. The difference is not significant for a single pizza, but over time and with more use, this difference can add up. Keep in mind that this calculation is based solely on electricity consumption, and other factors like preheating time and energy efficiency of the appliances may also influence overall energy usage.