Power Distribution

5 minutes 5 Questions

Power distribution is the process of transferring electrical power from a source to various devices and components within a computer system. This requires a combination of electrical cables, circuit breakers, and power distribution units (PDUs) to manage and control the flow of electricity. Effective power distribution ensures that devices receive the proper voltage and current required for optimal performance and that the electricity is evenly distributed across the entire system. This management helps to prevent failures, outages, and other issues associated with unbalanced electrical loads. Proper power distribution also allows technicians to isolate faults and troubleshoot issues without interrupting the operation of other devices in the system.

Guide on Power Distribution for CompTIA A+ Exams

Power Distribution is an important topic in CompTIA A+ certification. It revolves around the distribution of electrical power from the source to the devices in a computing environment.

The importance of understanding Power Distribution lies in the fact that all electronic devices need a proper power source to operate efficiently. Poor power distribution can lead to device malfunctions, data loss, and other significant issues. Hence, learning about Power Distribution is crucial for tech professionals to solve hardware-related troubles and ensure optimal system operations.

How it works: Power Distribution starts when the electricity from a power company is delivered to a transformer, which is then distributed to various components through power lines. In a computer system, the power supply unit (PSU) plays an essential role in distributing this power to the components such as the motherboard, hard drives, etc.

To answer questions related to Power Distribution in the CompTIA A+ exam, one should have a thorough understanding of the following:
- Types of power issues (surges, spikes, brownouts and blackouts)
- Power supply form factors
- The effect and indications of failing power on a computer system

Exam Tips: Answering Questions on Power Distribution
- Always read the question carefully to understand what is being asked.
- Use the process of elimination for the multiple-choice questions.
- Remember the distinction between different power issues and their effects on a system.
- Know the role and structure of the power supply unit (PSU) in any system.

Remember, understanding Power Distribution not only helps to pass the CompTIA A+ exam but also is a beneficial skill for any IT professional.

Test mode:

Exam (Timed)

Practice (With explanations)

Start practice test

Question 1

A user complains that their PC shuts off suddenly when connecting power-hungry devices, like an external hard drive. What is the best solution?

Upgrade power supply Change device cables Connect devices to another USB port Replace RAM modules

Correct Answer: Upgrade power supply

When the PC shuts off upon connecting power-hungry devices, it's likely due to an insufficient power supply. Upgrading it can provide the necessary power to run these devices without issues.

Question 2

After installing a new graphics card, a user's PC fails to boot. What is the best solution?

Connect 6-pin or 8-pin power connector Update the BIOS Remove the CPU cooler Swap the RAM slots

Correct Answer: Connect 6-pin or 8-pin power connector

The best solution is to connect the 6-pin or 8-pin power connector to the new graphics card. Modern graphics cards require additional power beyond what the motherboard's PCIe slot can provide. Without the proper power connection, the graphics card will not function, and the PC may fail to boot. Swapping RAM slots, removing the CPU cooler, or updating the BIOS would not address the issue of the graphics card not receiving sufficient power.

Question 3

A user complains their computer suddenly shuts down when running high-performance applications. What is the most likely issue?

Faulty USB connector Loose SATA cable Inadequate power supply Overclocked CPU

Correct Answer: Inadequate power supply

The most likely issue is an inadequate power supply. High-performance applications require more power, and if the power supply cannot provide enough wattage, the computer may suddenly shut down to protect its components from damage. An overclocked CPU could also cause shutdowns, but it's less likely if the user hasn't intentionally overclocked their processor. A loose SATA cable or faulty USB connector would not typically cause sudden shutdowns, especially only when running demanding applications.

Go Premium