Which strategy improves the energy efficiency of a device?

Which strategy improves the energy efficiency of a device?

• A. Install better insulation only
• B. Use more powerful machines
• C. Use better insulation, reduce energy losses, and choose more efficient components
• D. Ignore energy efficiency and rely on cheaper energy

Answer: (C)

Energy efficiency means getting the same result while using less energy by reducing losses and using components that waste less energy. Better insulation helps keep useful energy inside the device, so less energy leaks away as heat. Reducing energy losses means addressing all the ways energy can be wasted—like minimizing friction, improving seals, lowering electrical resistance, and cutting unnecessary heat generation. Using more efficient components means picking parts that perform the same task with less energy, such as efficient motors or electronics. Putting these ideas together gives the strongest improvement because you both cut waste and maximize the device’s performance per unit of energy. The other approaches are limited: insulation alone reduces one kind of loss but doesn’t optimize overall energy use; more powerful machines increase energy demand; and ignoring efficiency doesn’t reduce energy consumption.

Energy efficiency means getting the same result while using less energy by reducing losses and using components that waste less energy. Better insulation helps keep useful energy inside the device, so less energy leaks away as heat. Reducing energy losses means addressing all the ways energy can be wasted—like minimizing friction, improving seals, lowering electrical resistance, and cutting unnecessary heat generation. Using more efficient components means picking parts that perform the same task with less energy, such as efficient motors or electronics. Putting these ideas together gives the strongest improvement because you both cut waste and maximize the device’s performance per unit of energy. The other approaches are limited: insulation alone reduces one kind of loss but doesn’t optimize overall energy use; more powerful machines increase energy demand; and ignoring efficiency doesn’t reduce energy consumption.