Daily-life Question – Working Principle of Electrical Appliances

 By Tim Mok

(Math and Physics tutor at The Edge Learning Center)

Working principle of

Filament Light and Energy Saving Bulb

Working principle of

Thermal Flask

Working principle of

Dehumidifier

Working Principle of

Hair Dryer

Working principle of

Smoke Detector

Working principle of

Steam Iron

Working principle of

Battery Power Electric Fan

Tackling an exam question on electrical appliance – Dehumidifier

Read the description and figures (underline the key information)

A. Question – Explained-type

B. Question – Calculated-type including data table

Note the key words and marks of the question.
Part(a)

Question

Marking Scheme

Note the key words and marks of the question.
Part(b)

Question

Marking Scheme

Note the key words and marks of the question.
Part(c)

Question

Marking Scheme

Note the key words and marks of the question.
Part(d)

Question

Marking Scheme

Note the key words and marks of the question.
Part(e) (i)

Question

Marking Scheme

Note the key words and marks of the question.
Part (e) (ii)

Question

Marking Scheme

Classic Question Format

References

How Stuff Works?

http://www.howstuffworks.com/

How Does an Air Conditioner Work?

http://www.energyquest.ca.gov/how_it_works/air_conditioner.html