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Related Flashcards
Cards In This Set
| Front | Back |
|
Volts are a measure of what characteristic of
electricity?
|
The potential
difference in an electrical system
|
|
What
is the normal voltage of house electricity in the U.S.?
|
110
|
|
Hot
wires in home wiring are normally colored ____ and ground wires in computers
are normally colored _____.
|
Bla
|
|
What
is the difference between a transformer and a rectifier? Which are found in a
PC power supply?
|
A rectifier is a device that converts alternating current to
direct current. A transformer is a device that changes the ratio of current to
voltage. A computer power supply functions as both
|
|
What
are the five voltages produced by an ATX or BTX power supply?
|
+5, -5, +12, -12,
and +3.3
|
|
What
is the purpose of the 4-pin auxiliary connector on a motherboard?
|
To provide extra voltage for a processor
|
|
How
many pins does the main power connector on a BTX board have?
|
24 pin
|
|
When
taking a computer apart, why is it important to not stack boards on top of each
other?
|
You could accidentally dislodge a chip
|
|
Describe
the purpose of the ground line in a house circuit. What is the electrical
symbol for ground?
|
The electricity on the hot line is seeking the path of least
resistance, which is usually through some device that controls its current flow
as it moves to the neutral line that goes back to the power source. Sometimes
there is an easier path than through any controlling device, and the
electricity follows that path, causing a short. This sudden increase in the
flow of electricity can harm a person or a piece of equipment. The ground line
keeps the uncontrolled flow of electricity from continuing indefinitely.
The symbol for ground is a vertical line with three
horizontal lines underneath i
|
|
What
is the basic electronic building block of an integrated circuit?
|
The transistor
|
|
Why
is a power supply dangerous even after the power is disconnected?
|
Capacitors inside a PC power supply create the even flow of
current needed by the PC. Capacitors maintain their charge long after current
is no longer present, which is why the inside of a power supply can be
dangerous even when power is disconnected.
|
|
What
is the symbol for a diode?
|
The symbol for a diode is a vertical and horizontal line with
an arrow head at the point of intersection of the two lines. See Figure 4-16
|
|
What
is a simple way to detect EMI?
|
On an inexpensive AM radio, turn the tuning dial away from a
station into a low-frequency range. With the radio on, you can hear the static
produced by EMI. Try putting the radio next to several electronic devices to
detect the EMI they emit
|
|
What
is an unintended, high-current, closed connection between two points in a
circuit called?
|
A short, or short circuit
|
|
Which
form factor uses a riser card on the edge of the motherboard?
|
NLX
|
