Automotive Electronics Exam Real
Questions And Answers | Verified
A series circuit has three resistors of 4 ohms each. The voltage drop across each
resistor is 4 volts. Technician A says that the source voltage is 12 volts. Technician B
says that the total resistance is 18 ohms. Which technician is correct?
Tech A
Tech B
Both
Neither - Answer - ✔ Tech A
A vehicle has four parking lights all connected in parallel and one of the bulbs burns out.
Technician A says that this could cause the parking light fuse to blow (open).
Technician B says that it would decrease the current in the circuit. Which technician is
correct?
Tech A
Tech B
Both
Neither - Answer - ✔ Tech B
As additional branches are added to a a parallel circuit, total circuit resistance
________.
Remains the same
Decreases
Increases
None of the above - Answer - ✔ Decreases
Calculate the total resistance and current in a 12-volt parallel circuit with three resistors
of 4 ohms, 8 ohms, and 16 ohms, using any one of the five methods (calculator
suggested). What are the total resistance and current?
140 ohms (18 amps)
4 ohms (3.0 amps)
2.3 ohms (5.3 amps)
22 ohms (0.4 amps) - Answer - ✔ 2.3 ohms
If one branch of a parallel circuit loses continuity, the other branches will still each
receive source voltage and ground.
True
False - Answer - ✔ True
If the resistance and the voltage are known, what is the formula for finding the current
(amperes)?
I=ExR
E=IxR
,R=ExI
I = E / R - Answer - ✔ I = E / R
In a series circuit, total circuit resistance is equal to the ________ of the resistance of all
loads in the circuit.
Sum
Dividend
Difference
None of the Above - Answer - ✔ Sum
Kirchhoff's law states that the voltage around a closed circuit is equal to the sum of the
________ across all the loads.
Voltage drops
Resistances
Both A & B
Neither A nor B - Answer - ✔ Voltage drops
More electrical current will tend to flow through the branch of a parallel circuit with
________ resistance.
Infinite
Lowest
Highest
None of the Above - Answer - ✔ Lowest
Technician A says that electronic calculators have a memory function that can be used
to calculate resistance, current, and voltage values for a parallel circuit. Technician B
says that components of a series-parallel circuit are separated to simplify calculations.
Which technician is correct?
Tech A
Tech B
Both
Neither - Answer - ✔ Both
The amperage in a series circuit ________.
Is always less returning than leaving the battery.
Is the same anywhere in the circuit.
Is high at the beginning of the circuit and decreases as the current flows through the
resistance.
Varies in the circuit due to the different resistances. - Answer - ✔ Is the same anywhere
in the circuit.
The higher the resistance of a load in a series circuit, the __________ the voltage drops
across that load.
Less
Equal
More
, None of the above - Answer - ✔ More
The sum of the voltage drops in a series circuit equals the ________.
Resistance
Source voltage
Wattage
Amperage - Answer - ✔ Source voltage
The voltage for each branch of a parallel circuit is ________.
Reduced by the resistance of loads in each branch
Equal
Increased by the resistance of loads in each branch
None of the above - Answer - ✔ Equal
Two light bulbs are wired in series and one bulb burns out (opens.) Technician A says
that the other bulb will work. Technician B says that the current will increase in the
circuit because one electrical load (resistance) is no longer operating. Which technician
is correct?
Technician A
Technician B
Both Technicians A and B
Neither Technician A nor B - Answer - ✔ Neither
A series circuit has three resistors of 6 ohms each. The voltage drop across each
resistor is 4 volts. Technician A says that the source voltage is 12 volts. Technician B
says that the total resistance is 18 ohms. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B - Answer - ✔ Both Technicians A and B
If a 12 volt battery is connected to a series circuit with three resistors of 2 ohms, 4
ohms, and 6 ohms, how much current will flow through the circuit?
1 ampere
2 amperes
3 amperes
4 amperes - Answer - ✔ 1 ampere
A series circuit has two 10 ohm bulbs. A third 10 ohm bulb is added in series.
Technician A says that the three bulbs will be dimmer than when only two bulbs were in
the circuit. Technician B says that the current in the circuit will increase. Which
technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Questions And Answers | Verified
A series circuit has three resistors of 4 ohms each. The voltage drop across each
resistor is 4 volts. Technician A says that the source voltage is 12 volts. Technician B
says that the total resistance is 18 ohms. Which technician is correct?
Tech A
Tech B
Both
Neither - Answer - ✔ Tech A
A vehicle has four parking lights all connected in parallel and one of the bulbs burns out.
Technician A says that this could cause the parking light fuse to blow (open).
Technician B says that it would decrease the current in the circuit. Which technician is
correct?
Tech A
Tech B
Both
Neither - Answer - ✔ Tech B
As additional branches are added to a a parallel circuit, total circuit resistance
________.
Remains the same
Decreases
Increases
None of the above - Answer - ✔ Decreases
Calculate the total resistance and current in a 12-volt parallel circuit with three resistors
of 4 ohms, 8 ohms, and 16 ohms, using any one of the five methods (calculator
suggested). What are the total resistance and current?
140 ohms (18 amps)
4 ohms (3.0 amps)
2.3 ohms (5.3 amps)
22 ohms (0.4 amps) - Answer - ✔ 2.3 ohms
If one branch of a parallel circuit loses continuity, the other branches will still each
receive source voltage and ground.
True
False - Answer - ✔ True
If the resistance and the voltage are known, what is the formula for finding the current
(amperes)?
I=ExR
E=IxR
,R=ExI
I = E / R - Answer - ✔ I = E / R
In a series circuit, total circuit resistance is equal to the ________ of the resistance of all
loads in the circuit.
Sum
Dividend
Difference
None of the Above - Answer - ✔ Sum
Kirchhoff's law states that the voltage around a closed circuit is equal to the sum of the
________ across all the loads.
Voltage drops
Resistances
Both A & B
Neither A nor B - Answer - ✔ Voltage drops
More electrical current will tend to flow through the branch of a parallel circuit with
________ resistance.
Infinite
Lowest
Highest
None of the Above - Answer - ✔ Lowest
Technician A says that electronic calculators have a memory function that can be used
to calculate resistance, current, and voltage values for a parallel circuit. Technician B
says that components of a series-parallel circuit are separated to simplify calculations.
Which technician is correct?
Tech A
Tech B
Both
Neither - Answer - ✔ Both
The amperage in a series circuit ________.
Is always less returning than leaving the battery.
Is the same anywhere in the circuit.
Is high at the beginning of the circuit and decreases as the current flows through the
resistance.
Varies in the circuit due to the different resistances. - Answer - ✔ Is the same anywhere
in the circuit.
The higher the resistance of a load in a series circuit, the __________ the voltage drops
across that load.
Less
Equal
More
, None of the above - Answer - ✔ More
The sum of the voltage drops in a series circuit equals the ________.
Resistance
Source voltage
Wattage
Amperage - Answer - ✔ Source voltage
The voltage for each branch of a parallel circuit is ________.
Reduced by the resistance of loads in each branch
Equal
Increased by the resistance of loads in each branch
None of the above - Answer - ✔ Equal
Two light bulbs are wired in series and one bulb burns out (opens.) Technician A says
that the other bulb will work. Technician B says that the current will increase in the
circuit because one electrical load (resistance) is no longer operating. Which technician
is correct?
Technician A
Technician B
Both Technicians A and B
Neither Technician A nor B - Answer - ✔ Neither
A series circuit has three resistors of 6 ohms each. The voltage drop across each
resistor is 4 volts. Technician A says that the source voltage is 12 volts. Technician B
says that the total resistance is 18 ohms. Which technician is correct?
Technician A only
Technician B only
Both Technicians A and B
Neither Technician A nor B - Answer - ✔ Both Technicians A and B
If a 12 volt battery is connected to a series circuit with three resistors of 2 ohms, 4
ohms, and 6 ohms, how much current will flow through the circuit?
1 ampere
2 amperes
3 amperes
4 amperes - Answer - ✔ 1 ampere
A series circuit has two 10 ohm bulbs. A third 10 ohm bulb is added in series.
Technician A says that the three bulbs will be dimmer than when only two bulbs were in
the circuit. Technician B says that the current in the circuit will increase. Which
technician is correct?
Technician A only
Technician B only
Both Technicians A and B
