Question

9. An electrical device which consumes less units of electricity when used for
long hours a day is_​

Answer 1

Answer:

Approximate annual power bill on an old refrigetaror: Rs 4,468

BEE-rated refrigerator: Rs 2,916

Potential savings: Rs 1,552 a year

Approximate annual power bill when using a desktop at home: Rs 4,476

Laptop: Rs 1,167

Potential savings: Rs 3,309 a year

Answer 2

An electrical device which consumes less units of electricity when used for long hours is known as the power efficient electrical device.

• An energy efficient electrical device is a type of electrical device which consumes less amount of electricity and produces greater output for longer period of time.

• So,the input to output ratio for these devices is always the ratio which has greater consequent.

• The most common example of a power efficient electrical devices is LED bulb.