#7 Electrical Circuits Flashcards
(20 cards)
A break in the normal path of an electrical circuit causes an
open curcuit
The amount of current in a circuit is determined by
source voltage and resistance of the curcuit
If an open occures in a circuit, current will
decrease
As applied voltage increases
current increases (resistors cant change their values)
Voltage is
POTENTIAL DIFFERENCE
Resistance is
determined by curcuit construction
Amperage is
a measurement of current flow
Resistance of a curcuit decreases if
a short occures in a series or parallel circuit
As resistance of a circuit increases
current decreases (teeter totter) A up R down R up A down
If a resistor in a curcuit is shorted, an ammeter will read
More current than normal ( then you could blow a fuse… Right?)
Name some examples of resistance in heavy equipment electrical systems
light bulb, fan motor, 2 way radio, wiper motor….
Reduced current flow in a series circuit can be caused by
corroded terminals on a battery (would a starter have a hard time cranking with dirty terminals?)
C C R
S I R
P E I
Circuit Constant Add
Series I R
Parallel E I
When trouble shooting a curcuit know the ___ ___
Source Voltage before anything else
Which law states” One volt of electrical force is required to cause 1 Amp to flow through one Ohm of resistance
Ohms Law
E is the symbol for____ ___ Measured in ______
Electromotive Force
Volts
I is the symbol for _______ Measured in _______
Intensity of Current Flow
Amperes
A voltage drop is____ _____ _____ _____ ____ between 2 points in a circuit.
the difference in Electrical Potential
Total Resistance in a Parallel Network (or Circuit) will
Always be less than the smallest resistance
A short circuit occurs when current
takes a different path then intended
