A current of 11 amps at 240 V flows through an electric range. If it is used an average of one hour per day
b. Calculate the energy (kWh) used in a 30-day month. (Ans: 79.2 kWh)
To calculate the energy used in a 30-day month, we can use the formula:
Energy (kWh) = Power (kW) x Time (hours)
First, we need to convert the current from amps to kilowatts using the formula:
Power (kW) = Current (A) x Voltage (V) / 1000
Power (kW) = 11 A x 240 V / 1000 = 2.64 kW
Next, we multiply the power by the time to get the energy used:
Energy (kWh) = 2.64 kW x 1 hour = 2.64 kWh
Since the electric range is used for one hour per day, the energy used in a 30-day month would be:
30 days x 2.64 kWh/day = 79.2 kWh
Therefore, the energy used in a 30-day month is 79.2 kWh.