Power, Energy, time 2

In which of the following units is electrical consumption measured by electric companies for our household consumption in our homes?

• Kilowatt

• Kilowatt-hour

• Megawatt

• Volt

Water is to cubic meter: Electricity is to _______________

• Kilowatts                                             

• Kilowatt-hour

• kilometer

• Kilowatt-sec

Which electric meter has a reading of 1365 kilowatt-hour?

• 
• 
• 
• 

The electric meter reading last month was 3267 kwh. This month the reading is 3897 kwh. How much electricity was consumed for the whole month?

• 635 kwh

• 675 kwh

• 630 kwh

• 670 kwh

At home, a laptop can consume 50-watts per hour when its being used. How many kwh does it consume if it is used for 8 hours in a day?

• 300 kwh

• 0.4 kwh

• 400 kwh

• 600 kwh

At home, a laptop can consume 50-watts per hour when its being used. How many kwh does it consume if it is used for 8 hours in a day?

• 300 kwh

• 0.4 kwh

• 400 kwh

• 600 kwh

The unit for Electrical Power is

• hour

• ampere

• watt

• Volt

The S.I unit for Electrical Energy is

• kwh

• KWj

• kWh

• KWJ

This is Lavinder's TV. What is the power rating of this TV?

• Toshiba

• 1000 W

• SMART TV 40

• RM 899.

if you use your laptop 10 hours a day for 1 year - how much will you have to pay if the cost of 1 kiloWatt hour is 20 cents

Give your answer to the nearest $

Answer explanation

Time = 10 h x 365 days

= 3650 hours

E= Power x time = 0.085 x 3650 = 310.25 kiloWatt Hours

Cost = 310.25 x 20 = 6205 sen

or about 62$