The jolt that keeps you working

Published on June 15th, 2011 at 8:00 am

Last modified on August 13th, 2012 at 10:21 am



What type of voltages would you commonly expect to find on motherboard’s power supply connector?

A) 120V AC

B) 12V DC, 5V DC, 3.3V DC

C) 12V AC, 5V AC, 3.3V AC

D) 120V DC

E) I’ve been too long, I’m glad to be back


The answer: B) 12V DC, 5V DC, 3.3V DC

A computer’s power supply provides the motherboard with a number of different DC voltages, usually including 3.3 volts DC, 5 volts DC, and 12 volts DC.

Want to know more? Watch “Troubleshooting Power Supplies.”

Troubleshooting power supplies requires some specialized tools and some common troubleshooting techniques. In this video, you’ll learn about circuit testers, the value of a good multimeter, and how to use these tools to troubleshoot power outlets and power supplies.

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Category: CompTIA A+ Pop Quizzes

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