Week #1 - Fundamental of Electricity Flashcards
What is the moving electrical component in a solenoid known as?
The armature
What type of circuit offers only one path for current flow?
a. series-parallel
b. parallel
c. series
d. open
c. series
Which of the following elements could be described as being electrically inert?
a. neon
b. oxygen
c. iron
d. caron
a. neon
- A farad is a measure of what?
Capacitance
Which of the following is a measure of electrical circuit current flow?
a. amps
b. watts
c. ohms
d. volts
a. amps
When describing the negative post of a battery terminal in an energized electrical circuit, which of the following applies?
a. It is electrically neutral.
b. It is the source of electrons flowing through the circuit.
c. It has a deficit of electrons.
d. It is more positive than the first load in the circuit.
b. It is the source of electrons flowing through the circuit.
What describes resistance to movement to magnetic lines of force?
Reluctance
If one branch of a parallel circuit has high resistance, how will total circuit current be affected?
Current will decrease
True or False: Magnetism is a source of electrical energy in truck electrical systems.
True
Which of the following is a measure of electrical pressure?
a. watts
b. voltage
c. amperes
d. ohms
b. voltage
What component is used in a truck electrical circuit to convert electromagnetic energy into mechanical movement?
A solenoid
Resistance to current flow is measured in ______.
Ohms
Which of the following is a measure of charge differential?
a. ohms
b. amperage
c. voltage
d. wattage
c. voltage
Which of the following would cause high resistance in a closed electrical circuit?
a. broken wire
b. short to ground
c. corroded terminals
d. heavy gauge electrical wiring
c. corroded terminals
Use Ohm’s law to calculate the current flow in a series circuit with a 12V power source and a total circuit resistance of 6Ω.
2 amps
If an electrical connection in a closed electrical circuit heats up, which of the following would be the more likely cause?
a. overcharged battery
b. a blown fuse
c. wire gauge thickness too large
d. corroded connectors
d. corroded connectors
According to Ohm’s Law, what should happen to current flow if circuit resistance increases and voltage remains the same? Will it cease, increase or decrease?
Decrease
According to Watt’s Law, if current flow through an electrical circuit increases, what is likely to happen to the power consumed? Will it increase, decrease or have no effect
increase
When a dead short occurs, which of the following would be true?
a. Voltage increases.
b. Circuit resistance increases.
c. Current flow increases.
d. All of the above are true.
c. Current flow increases.
How many electrons does the element silicon have in its outer shell?
4
Calculate the power consumed in a circuit through which 3A are flowed at a potential difference of 24V.
72 watts
A chemical reaction is a source of electrical energy in truck electrical systems.
True
Who originated the branch of electricity generally described as electromagnetism?
Faraday
Which of the following is the best insulator of electricity?
a. tap water
b. distilled water
c. copper
d. aluminum
b. distilled water
A break in a circuit that causes a loss of continuity is called what?
open
What unit of measurement expresses electron flow in a circuit?
amps
An element classified as a semiconductor would have how many electrons in its outer shell?
4
A circuit protection device that opens when overloaded and then automatically resets is known as what?
Cycling circuit breaker
Does a material described as an insulator have 4, more than 4, or less than 4 electrons in its outer shell?
More than 4
If you add up all the voltage drops (Kirchhoff’s Second Law) in any closed electrical circuit, what should they add up to?
source voltage
Which of the following devices is sused to open and close electrical circuits?
a. a transformer
b. a capacitor
c. a magnetic switch
d. a solenoid
c. a magnetic switch
