WorksheetsLesson 2 Electrics Test
Total questions: 25
Worksheet time: 25mins
What is the component labeled with number 1 in the diagram?
Wiring
Fuse
Switch
Battery
Which number corresponds to the "Load device (consumer)" in the diagram?
2
3
4
5
What does the number 3 represent in the diagram?
Battery
Wiring
Fuse
Earth return wiring
Which component is indicated by number 6?
Battery
Wiring
Switch
Earth return wiring
What type of circuit is shown in the diagram?
Parallel Circuit
Series Circuit
Complex Circuit
Open Circuit
What type of circuit is shown in the diagram where the light bulbs are labeled with "4V"?
Parallel Circuit
Series Circuit
Complex Circuit
Simple Circuit
How do you calculate the total resistance of a series circuit?
Total Resistance = R1 x R2 x R3
Total Resistance = R1 + R2 + R3
Total Resistance = (R1 + R2 + R3) / 3
Total Resistance = 1/(1/R1 + 1/R2 + 1/R3)
If each of the three bulbs in a series circuit has a resistance of 2 ohms, what is the total resistance?
2 ohms
4 ohms
6 ohms
8 ohms
What happens to the current at all points of a series circuit?
It varies depending on the resistance
It stays the same
It doubles
It is zero
What is the consequence of one component failing in a series circuit?
Only the component that failed will stop working
The current in the circuit will double
All components in the circuit will fail
The total resistance of the circuit will decrease
How is the total resistance of a circuit calculated when resistors are connected in series?
By dividing the resistances
By multiplying the resistances
By subtracting the resistances
By adding the resistances together
What type of electrical circuit is shown in the diagram?
Series Circuit
Parallel Circuit
Complex Circuit
Simple Circuit
What type of circuit is shown in the diagram?
Series Circuit
Parallel Circuit
Complex Circuit
Simple Circuit
If three 5-ohm resistors are connected in parallel, what is the total resistance?
1.666 ohms
5 ohms
15 ohms
0.6 ohms
What happens to the total resistance when more branches are added in a parallel circuit?
The total resistance increases.
The total resistance decreases.
The total resistance remains the same.
The total resistance becomes zero.
When comparing the total resistance value in a parallel circuit to the lowest resistor value in one of the branches, what do you notice?
The total resistance is higher than the lowest resistor value.
The total resistance is lower than the lowest resistor value.
The total resistance is equal to the lowest resistor value.
The total resistance is unrelated to the lowest resistor value.
In a parallel circuit, how are the components supplied?
With different voltages for each component
With the same current for each component
With the same voltage for each component
With the same resistance for each component
What happens if one component fails in a parallel circuit?
The circuit stops working completely
The voltage in the circuit increases
The other components will still operate
The total resistance of the circuit becomes zero
What can be said about the total resistance of a parallel circuit?
It is equal to the sum of all resistances in the circuit
It will always be more than the highest resistance in the circuit
It will always be less than the lowest resistance in the circuit
It is irrelevant in a parallel circuit
What is identified by measuring a voltage drop using a voltmeter in a circuit?
The efficiency of the circuit
Unwanted resistances within the circuit
The power consumption of the circuit
The current flow direction
Which of the following can cause excessive voltage drop due to unwanted resistance in a circuit?
Properly sized wires
Good connections
Defective switch contacts
Clean contacts
What is NOT a factor that can cause unwanted resistance in a circuit?
Undersize wires
Bad connections
Corrosion
Oversize wires
Before testing for voltage drop in a circuit, what must you do first?
Disconnect the battery
Take a battery voltage reading with the load switched on
Replace the circuit components
Measure the resistance of the circuit
Why do you need to take a battery voltage reading before testing for voltage drop?
To ensure the battery is fully charged
To check the functionality of the multimeter
To prevent damage to the circuit
To avoid misidentifying the circuit as having an excessive voltage drop when the low reading measured is the same as the battery voltage
At what point does voltage drop become a cause for concern?
When it is more than 0.1 volts
When it is more than 0.5 volts
When it is more than 1 volt
When it is more than 2 volts
