Question

question 9

you have purchased a solar backup power device to provide temporary electrical power to critical systems in your data center should the power provided by the electrical utility company go out. the solar panel array captures sunlight, converts it into direct current (dc), and stores it in large batteries.

the power supplies on the servers, switches, and routers in your data center require alternating current (ac) to operate.

which electrical device should you implement to convert the dc power stored in the batteries into ac power that can be used in the data center?

a transformer
b capacitor
c transistor
d inverter

Explanation:

Analyze the power requirements

The scenario describes a solar backup power system in a data center. The solar panels generate direct current (DC) power, which is stored in large batteries. However, the data center equipment (servers, switches, and routers) requires alternating current (AC) power to operate. Therefore, we need a device that converts DC power to AC power.

Evaluate the function of each option

• Transformer: A device used to increase (step up) or decrease (step down) the voltage levels of alternating current (AC) electricity. It does not convert DC to AC.
• Capacitor: A passive electronic component that stores electrical energy in an electric field. It is used for filtering, smoothing, and energy storage, but does not perform power conversion between DC and AC.
• Transistor: A semiconductor device used to amplify or switch electrical signals and power. While it is a building block of power electronics, a single transistor on its own does not perform the system-level conversion of DC to AC.
• Inverter: An electrical device or circuitry that changes direct current (DC) to alternating current (AC). This matches the exact requirement of converting the battery-stored DC power into AC power for the data center equipment.

Determine the correct device

Based on the functional definitions, an Inverter is the specific electrical device designed to convert DC power from the batteries into AC power for the data center systems.

Answer:

• (A) Transformer
• (B) Capacitor
• (C) Transistor
• (D) Inverter (Correct answer)