WorksheetsCircuit Review
Total questions: 26
Worksheet time: 27mins
The diagram shows three light bulbs connected in a parallel circuit with an open switch. Which light bulb will be turned off by the opened switch?
Light bulb 1
Light bulb 2
Both light bulbs 2 and 3
Both light bulbs 1 and 2
Carlos built a simple circuit with two resistors (R₁, R₂) and a switch (S). He opened the switch S and current flowed through resistor R₁ but not through resistor R₂. Which circuit did Carlos most likely build?
A
B
C
D
The picture shows a circuit. What would happen if the light bulb in the middle were removed?
The first and third bulb would not light up.
The first and third bulb would both light up.
The first bulb would not light, but the third bulb would light.
The first bulb would light, but the third bulb would not light.
Which of the following is a correct comparison of a series circuit and a parallel circuit?
A series circuit and a parallel circuit both require a power source and a closed circuit, and both convert electrical energy to light, heat, or sound.
A series circuit and a parallel circuit both require a power source and an open circuit, and both convert electrical energy to light, heat, or sound.
A series circuit requires a power source, a closed circuit, and converts electrical energy to light, heat, or sound. A parallel circuit requires a power source, an open circuit, and converts electrical energy to light, heat, or sound.
A series circuit requires a power source, an open circuit, and converts electrical energy to light, heat, or sound. A parallel circuit requires a power source, a closed circuit, and converts electrical energy to light, heat, or sound.
The diagram shows a circuit with a battery, three light bulbs, and a switch. What will a student most likely observe if the switch is closed?
Light bulbs 1, 2, and 3 will all turn on.
Light bulb 3 will turn on, but Light bulbs 1 and 2 will turn off.
Light bulbs 1, 2, and 3 will all turn off.
Light bulbs 1 and 2 will turn on, but Light bulb 3 will turn off.
The diagram shows a simple circuit. What will happen if Bulb 1 burns out?
Bulb 2 will go out because it is connected in series to Bulb 1.
Bulb 2 will go out because it is connected in parallel to Bulb 1.
Bulb 2 will remain lit because it is connected in series to Bulb 1.
Bulb 2 will remain lit because it is connected in parallel to Bulb 1.
Which statement correctly describes each circuit?
The bulbs in Circuit 1 are connected in series, and the bulbs in Circuit 2 are connected in parallel.
The bulbs in Circuit 1 are connected in parallel, and the bulbs in Circuit 2 are connected in series.
The bulbs in both circuits are connected in series.
The bulbs in both circuits are connected in parallel.
The data table shows the resistivity of various materials used for wire. Which statement correctly compares the current flow for the materials?
Copper allows a higher current flow than silver.
Aluminum allows a higher current flow than silver.
Tungsten allows a higher current flow than copper.
Copper allows a higher current flow than aluminum.
The image shows an electrical circuit. What TWO statements describe the changes in the circuit’s performance if a thicker wire is used? Pick up to 5 answers.
The resistance of the wire decreases.
The current through the wire increases.
The current through the wire decreases.
The resistance of the wire remains the same.
The current through the wire remains the same.
What effects do impurities in a wire have on its resistance and current flow?
Impurities in the wire decrease the resistance and increase the current flow.
Impurities in the wire increase the resistance and decrease the current flow.
Impurities in the wire cause the resistance to remain the same while increasing the current flow.
Impurities in the wire cause the resistance to increase while the current flow remains the same.
A student builds a circuit, as shown. Which is the BEST action to increase the current through the circuit?
Decrease the length of the wire to increase the resistance.
Decrease the length of the wire to decrease the resistance.
Increase the length of the wire to increase the resistance.
Increase the length of the wire to decrease the resistance.
The image shows the arrangement of the magnetic moments of atoms in two samples of metal. Which BEST identifies the magnetized sample?
Sample 1, because the magnetic moments of the atoms are mostly arranged in the same direction.
Sample 1, because the magnetic moments of the atoms are mostly arranged in different directions.
Sample 2, because the magnetic moments of the atoms are mostly arranged in the same direction.
Sample 2, because the magnetic moments of the atoms are mostly arranged in different directions.
The image shows magnetic domains within two metal bars. Which statement correctly describes the two bars?
Bar 1 and Bar 2 are magnetized.
Bar 1 and Bar 2 are not magnetized.
Bar 1 is magnetized, while Bar 2 is not.
Bar 2 is magnetized, while Bar 1 is not.
Landon makes the two electromagnets shown. Landon deliberately wrapped the wires around the nails in different directions on each electromagnet. He wants to test how this difference affects the polarity of the electromagnet. What object could Landon use to test this?
a paper clip
a bar magnet
a 3-volt battery
a piece of paper
Maria makes an electromagnet shown in the figure. The battery has a voltage of 6.0V, and she uses an iron nail. Which of the following would increase the strength of the magnetic field produced?
Doubling the number of times the wire wraps around the nail.
Changing the battery to a 3.0V battery.
Reversing the direction of the current flow.
Replacing the iron nail with one made of plastic.
A student creates an electromagnetic wave and then reverses the direction of the current. Which of the following will happen to the magnetic field?
The direction of the magnetic field will reverse.
The magnetic field will expand.
The magnetic field will be cancelled out and disappear.
The magnetic field will cause the voltage of the battery to be reduced.
Which statement BEST explains why batteries must be facing the correct direction in a flashlight for the flashlight to turn on?
Batteries in a flashlight produce direct current (DC) so the charge only flows one way.
Batteries in a flashlight produce alternating current (AC) so the charge only flows one way.
Batteries in a flashlight produce direct current (DC) so the flow of charge changes direction periodically.
Batteries in a flashlight produce alternating current (AC) so the flow of charge changes direction periodically.
Noel is trying to understand the relationship between electron flow and the polarity of an electromagnet. He wants to test the electromagnet he created. First, Noel needs to know which direction electrons flow through the copper wire. Which statement about the flow of electrons is correct?
Electrons flow from north to south because of Earth's magnetic field.
Electrons flow from south to north because of Earth's magnetic field.
Electrons flow from the positive terminal of a battery to the negative terminal of a battery.
Electrons flow from the negative terminal of a battery to the positive terminal of a battery.
A student is planning an experiment using a nail, wire, and a battery to investigate which factors affect the strength of an electromagnet and which factors do not affect its strength. Which factor would LEAST affect the strength of the electromagnet?
the kind of metal used for the nail in the electromagnet
the amount of current flowing through the electromagnet
the number of coils of wire used in the electromagnet
the direction of the current flowing through the electromagnet
Which describes a series circuit?
a circuit that has only one path for moving electrons
a circuit that has many paths for moving electrons
a circuit with multiple components
a circuit with only one component
The diagram shows an electric circuit. Which switches must be closed to produce a current in conductor AB?
1 and 4
2 and 3
1, 2, and 3
2, 3, and 4
Which circuit shows resistors connected in series?
A
B
C
D
In the circuit shown, there is a resistance of 20 ohms and a current of 0.5 amps. What is the voltage of the circuit?
10 volts
20 volts
30 volts
40 volts
A student wants to make an ordinary iron object into a permanent magnet. The student rubs a magnet on the iron object in one direction 20 times. How does rubbing the iron object change its magnetic properties?
The magnetic domains are reoriented in the same direction as the magnetic field.
The magnetic domains are reoriented in the opposite direction as the magnetic field.
The magnetic domains are randomly oriented, causing the iron to lose its magnetic field.
The magnetic domains are randomly oriented, causing the iron to develop a magnetic field.
What is a disadvantage of using a series circuit?
It requires a complicated pattern of wires to create.
Additional power sources are not able to be added.
Extra output devices increase the speed of the current.
If one section of the circuit fails, the whole circuit fails.
There are four lightbulbs connected in a circuit. These bulbs are brighter if they are connected...
in series.
in parallel.
