LSS13.4 Consumption Of Electrical Energy

The power of an electrical appliance is the amount of ____ energy used for _____ to other forms of energy ____ ____ ____.

(a)  

The SI unit of power is the ____, and the symbol is the letter ____, in ____ (upper/lower) case.

(a)  

The amount of electrical energy consumed can be calculated by the ____ of the power and the ____.

(a)  

An electric oven has a power rating of 1200 W. What is the electrical energy used (in kWh) if turned on for 30 mins?

• 1200 x 30

• 1200 x 0.5

• 1.2 x 30

• 1.2 x 0.5

Which are ways to conserve energy at home?

• Buy electrical appliances that have energy labels with three or more ticks.

• Switch off the water heater after use

• Use a vacuum flask instead of an electric hot water dispenser

• Switch off the power socket to reduce standby power.

• Switch off the air conditioner after a short while and then switch to a fan