Understanding Energy and Power Calculations

The video tutorial explains how to calculate energy costs using kilowatt-hours. It covers the necessary formulas and unit conversions, providing examples with Xbox, TV, and stove usage. The tutorial emphasizes the importance of using the correct units and offers practical examples to illustrate the calculations.

What is the basic formula for calculating energy?

• Energy = Power / Time

• Energy = Power x Time

• Energy = Power + Time

• Energy = Time / Power

Which unit is used to measure power in the context of energy calculation?

• Seconds

• Kilowatt-hours

• Watts

• Joules

How do you convert watts to kilowatts?

• Divide by 60

• Multiply by 60

• Divide by 1000

• Multiply by 1000

What is the formula to calculate the cost of electricity?

• Cost = Energy x Tariff

• Cost = Power x Tariff

• Cost = Time x Tariff

• Cost = Energy / Tariff

If the tariff rate is 9.85 cents per kilowatt-hour, what is the cost for using 1 kilowatt-hour?

• 9.85 cents

• 0.0985 cents

• 98.5 cents

• 0.985 cents

In the example, what is the combined power consumption of the Xbox and television?

• 160 watts

• 200 watts

• 360 watts

• 560 watts

How many kilowatts is 360 watts?

• 36 kilowatts

• 0.36 kilowatts

• 0.036 kilowatts

• 3.6 kilowatts

What is the energy consumed if the Xbox and television are used for 8 hours?

• 2.88 kilowatt-hours

• 3.6 kilowatt-hours

• 10.88 kilowatt-hours

• 28.8 kilowatt-hours

What is the power consumption of the stove in kilowatts if it operates at 240 volts and 15 amperes?

• 3.6 kilowatts

• 36 kilowatts

• 0.36 kilowatts

• 360 kilowatts

How much energy is consumed by the stove in 0.5 hours?

• 0.018 kilowatt-hours

• 0.18 kilowatt-hours

• 1.8 kilowatt-hours

• 18 kilowatt-hours