Understanding Commercial Unit of Electric Energy

This video tutorial explains the commercial unit of electric energy, the kilowatt hour, and its significance in measuring electricity usage at home. It covers the basics of power units, including watts and kilowatts, and how they relate to joules. The tutorial also details the conversion of kilowatt hours to joules, emphasizing the practicality of using kilowatt hours as a larger unit for measuring electrical energy consumption over time.

What is the commercial unit of electric energy?

• Kilowatt

• Watt

• Joule

• Kilowatt-hour

What does an electric meter in our homes measure?

• Voltage

• Current

• Power

• Energy consumption

How many watts are there in one kilowatt?

• 10000

• 1000

• 10

• 100

If a device has a power of 1 watt, how much work does it do per second?

• 1000 Joules

• 100 Joules

• 10 Joules

• 1 Joule

What is the power of a device that does 60 Joules of work per second?

• 1000 Watts

• 1 Watt

• 60 Watts

• 600 Watts

Why is the unit Joule considered very small for measuring electric energy?

• It is not used in practical applications

• It represents a very small amount of energy

• It is difficult to calculate

• It is not a standard unit

How is one kilowatt-hour represented symbolically?

• kW/h

• kWh

• kW-h

• kW

How many seconds are there in one hour?

• 3600

• 600

• 1800

• 7200

What is the value of one kilowatt-hour in Joules?

• 3600 Joules

• 36000 Joules

• 360000 Joules

• 3600000 Joules