Power: 300 W
Time: 5 h/day * 30 days = 150 h
Energy = Power * Time = 300 * 150 = 45000 Kilowatt Hours
If you want the answer in J:
45000 Kw.H * 3600000 J/(Kw.H) = 162000000000 J = 162 GJ = 0.162 TJ
To determine the amount of electricity consumed by a device or appliance, you can use a device called a wattmeter or check the device's power rating in watts and the time it is used to calculate the energy consumption in kilowatt-hours.
Electricity is measured in units called kilowatt-hours (kWh). One kilowatt-hour is equal to the amount of energy used by a 1,000-watt appliance in one hour. Utility companies measure the electricity consumption of a household or business in kilowatt-hours to determine how much to charge for electricity usage.
An electricity meter, also known as a watt-hour meter or electric meter, is the instrument used to measure how much electricity is consumed by a building or appliance. The meter typically records the amount of energy used in kilowatt-hours.
The equation to calculate the amount of energy used by an appliance is: Energy (kWh) = Power (kW) x Time (hours). Multiply the power consumption of the appliance in kilowatts by the number of hours it's used to find the total energy consumed in kilowatt-hours.
To determine the cost of running an appliance for a day, week, or year, you need to know its wattage and the cost of electricity per kilowatt-hour (kWh). For example, if an appliance uses 1000 watts (1 kW) and electricity costs $0.12 per kWh, it would cost about $1.20 to run for 10 hours in a day, $8.40 for a week, and $436.80 for a year. Simply multiply the appliance's wattage by the hours used, convert to kW, and then multiply by the cost of electricity to find the total.
1500 watt hours
To calculate the cost of electricity for a 1400W appliance used for 2 hours, you first need to convert the wattage to kilowatts by dividing by 1000 (1400W = 1.4kW). Then, multiply the kilowatts by the number of hours used (1.4kW * 2 hours = 2.8 kWh). Finally, multiply the kilowatt-hours by the electricity rate per unit to determine the cost.
Electricity usage in a house is typically measured using a device called an electric meter, which keeps track of the amount of electricity consumed in kilowatt-hours (kWh). The meter is usually located either inside or outside the house, and readings are recorded regularly by the utility company to determine the amount of electricity used and bill the customer accordingly.
An electricity meter measures the amount of electricity consumed by tracking the flow of electrical current through it. It records the amount of electricity used in kilowatt-hours, which is then displayed on the meter or transmitted to the utility company for billing purposes.
You can buy a volt meter, which can calculate how much electricity is passing through the wires.
100 watts × 10 hours = 1000 watt hours = 1 kilowatt hour (= 1 kwh) = 1 unit of electricity.
MWhrs stands for megawatt-hours, which is a unit of measurement for electricity representing one million watt-hours. It is commonly used to measure the amount of electricity consumed or generated over a certain period of time.