By energy you mean watt hours. So the equation is watts x hours = 1680 watt hrs. Or stated in Kilowatts it would be 1.68 kw hrs. Average cost in USA would be about 18 cents.
To calculate the energy consumed by a 60 watt bulb burning for 28 hours, you can use the formula: Energy (kWh) = Power (kW) ร Time (h). Convert the power from watts to kilowatts by dividing by 1000 (60 watts = 0.06 kW). Then multiply by the time in hours (0.06 kW ร 28 hours) to get the energy consumed in kilowatt-hours. In this case, the bulb would consume 1.68 kWh of energy.
A 100-watt electric bulb consumes 200 watt-hours of energy in two hours (100 watts x 2 hours = 200 watt-hours).
To calculate the energy used by a light bulb, you can multiply the power of the bulb in watts by the time it is turned on in hours. This will give you the energy consumption in watt-hours (Wh). For example, a 60-watt bulb running for 5 hours would consume 300 watt-hours (or 0.3 kilowatt-hours) of energy.
A zero-volt bulb actually runs on some fixed supply voltage, so the term is not strictly correct. The voltage times the current in amps will give the power used by the bulb in watts, which is converted into watt-hours of energy by multiplying by the number of hours used.
A 32-watt fluorescent bulb, when used for 1 hour, will consume 0.032 kWh (32 watts รท 1000). The energy consumption can be calculated by multiplying the wattage by the number of hours used.
A 100-watt light bulb consumes 100 watts of energy in one hour, as power is the rate at which energy is consumed. Therefore, it will take one hour for a 100-watt light bulb to consume 100 watt-hours of energy.
A 100-watt electric bulb consumes 200 watt-hours of energy in two hours (100 watts x 2 hours = 200 watt-hours).
The formula to calculate the energy usage of a light bulb is Power (Watts) x Time (hours) = Energy Used (Watt-hours). For example, a 60-watt light bulb used for 5 hours would consume 300 Watt-hours of energy.
To calculate the energy used by a light bulb, you can multiply the power of the bulb in watts by the time it is turned on in hours. This will give you the energy consumption in watt-hours (Wh). For example, a 60-watt bulb running for 5 hours would consume 300 watt-hours (or 0.3 kilowatt-hours) of energy.
Assuming the 100 watt light bulb is always on, it would consume 100 units of energy in 1 hour (100 watt-hours = 0.1 kilowatt-hour = 1 unit of energy per hour).
A zero-volt bulb actually runs on some fixed supply voltage, so the term is not strictly correct. The voltage times the current in amps will give the power used by the bulb in watts, which is converted into watt-hours of energy by multiplying by the number of hours used.
60 watt-hrs= 60 watt*1 hr so it will take 1 hour.
A 32-watt fluorescent bulb, when used for 1 hour, will consume 0.032 kWh (32 watts รท 1000). The energy consumption can be calculated by multiplying the wattage by the number of hours used.
A 100-watt light bulb consumes 100 watts of energy in one hour, as power is the rate at which energy is consumed. Therefore, it will take one hour for a 100-watt light bulb to consume 100 watt-hours of energy.
Convert the 100 watts to kilowatts. Calculate the total time in hours, and multiply by the number of kilowatts that the light bulb uses.
A 200W light bulb will use 0.2 kWh (kilowatt-hour) of electricity per hour of operation. If the bulb is on for 5 hours, it would consume 1 kWh.
This would be 30 watthours, or 0.030 kilowatthours
The energy given off by a 100 W bulb in 4 hours can be calculated using the formula: Energy = Power x Time. Thus, Energy = 100 W x 4 hours = 400 Wh, or 0.4 kWh.