A company executive asks the network administrator to help to reduce power consumption in a datacenter. The administrator suggests changing the servers running on 110V to 220V. Which of the…

Question

Options

• AThe room temperature will be reduced
• BAmperage consumed by each server will be reduced by 50%
• CTwice as much heat will be generated in the server room
• DPower redundancy will be added to the server by providing two 110V power sources

• A
  76% (26)
• B
  6% (2)
• C
  15% (5)
• D
  3% (1)

Explanation

When servers are switched from 110V to 220V, they draw the same wattage but at twice the voltage, meaning the current (amperage) from the supply is halved (I = P/V). Lower current dramatically reduces resistive heat loss throughout the power delivery chain - cables, connectors, and power supply components - because heat loss scales with the square of current (P_heat = I²R). This reduced energy waste as heat directly lowers the overall room temperature. Option B is mechanistically true (wall current is halved) but describes the cause rather than the observable datacenter outcome the question asks about. Option C is the opposite of what happens - less current means less heat, not more. Option D describes dual-PSU redundancy, which is a separate concept unrelated to voltage levels.

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