Understanding Power and Electric Energy

The video tutorial explains the concept of power as the rate at which energy is used, with examples like a toaster and a light bulb. It details how electric power is calculated by multiplying voltage and current, using a light bulb as an example. The tutorial also covers electric meters, which measure the flow of electric energy into buildings, and explains how electric energy is measured in kilowatt hours, which is used to calculate electric bills.

What is the power consumption of a toaster mentioned in the video?

• 700 watts

• 1000 watts

• 1200 watts

• 500 watts

How is electric power calculated?

• By subtracting current from voltage

• By multiplying voltage by current

• By adding voltage and current

• By dividing voltage by current

What is the power consumption of the light bulb discussed in the video?

• 80 watts

• 60 watts

• 40 watts

• 20 watts

What do electric meters measure?

• The voltage in a building

• The current of electric energy flowing into a building

• The temperature of electrical devices

• The resistance of electrical appliances

How is electric energy commonly measured?

• In volts

• In amperes

• In kilowatt hours

• In joules