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Two main ways to reduce electrical energy consumption suggested by the chapter are
ASwitching off unused appliances and using efficient devices
BIncreasing the wire thickness throughout the house
CRunning fans continuously through the night
DUsing bulbs of higher wattage in every room
Answer & Solution
Correct answer: A. Switching off unused appliances and using efficient devices
1. The chapter section on efficient use of energy suggests responsible habits.
2. Switching off unused appliances cuts wasteful use.
3. Choosing efficient (BEE star-rated) devices uses less power for the same job.
4. Hence option A is correct.
_Source: Selina Concise Physics Class 9, Ch 9 Current Electricity (Mistral OCR'd PDF), section on efficient use of energy_
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