In which century did electricity begin to be used in refrigeration systems?

• A. 19th century
• B. 20th century
• C. 21st century
• D. 18th century

Answer: (B)

Electricity began to be used in refrigeration systems primarily in the 19th century, which aligns with the development of the first practical refrigeration machines. The invention of the electric refrigerator is attributed to advancements made during the late 1800s and early 1900s, notably with the introduction of mechanical refrigerators that utilized electric power for cooling purposes.

The 20th century is particularly significant as it saw the commercialization and widespread adoption of electric refrigeration systems in households and industries, transforming food preservation and the way perishable goods were stored. This transition marked a revolutionary shift in technology, making refrigeration more efficient and accessible.

The 18th century predates these developments, as the foundational concepts of refrigeration were still emerging, and the use of electricity was not yet realized. Similarly, the 21st century relates to modern advancements in refrigeration technology, but the initial use of electricity for refrigeration systems began much earlier, making the 20th century the correct period for the widespread implementation and innovation of electric refrigeration.