Compare conductors and insulators, series and parallel circuits, switches, fuses and circuit symbols. Review suitability for your learners before teaching.
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Worksheet StudioPractice pack · Ages 7-9
Conductors, insulators & circuits
Take your time. Show your thinking.
1. What is the role of the cell or battery in an electrical circuit: it provides the electrical energy (potential difference / voltage) that pushes charges around the circuit, or it absorbs light?
Cell (+) ── Switch ── (−) · Closed Series Loop
2. Which circuit instrument is connected IN PARALLEL across a component to measure the potential difference (voltage) in volts (V): a voltmeter or an ammeter?
Cell (+) ── Switch ── (−) · Closed Series Loop
3. What happens if two identical cells in a torch are put in facing opposite directions (+ touching +): their voltages cancel out and the bulb will not light, or the bulb shines twice as bright?
Cell (+) ── Switch ── (−) · Closed Series Loop
4. If you add a second cell in series (pointing in the same direction, + to −) to a circuit with a single bulb, what happens to the bulb: it shines more brightly because the voltage pushing the current has doubled, or it goes out?
Cell (+) ── Switch ── (−) · Closed Series Loop
5. Materials such as copper, aluminium, silver and steel that allow electric current to flow through them easily are called: electrical conductors or electrical insulators?
Cell (+) ── Switch ── (−) · Closed Series Loop
6. Why are the lights and sockets in a home wired in PARALLEL rather than in series: each light is on its own branch so it receives full voltage and can be switched on or off independently without turning off the others, or parallel uses no wire?
Cell (+) ── Switch ── (−) · Closed Series Loop
7. In a standard circuit diagram, what component is represented by a circle with the letter “M” inside it: an electric motor or a buzzer?
Cell (+) ── Switch ── (−) · Closed Series Loop
8. In a standard circuit diagram, what component is represented by a circle with an “X” (cross) inside it: a filament lamp (bulb) or a battery?
Cell (+) ── Switch ── (−) · Closed Series Loop
9. Why should you NEVER touch mains electrical switches, plugs or sockets with wet hands: tap water contains dissolved salts (ions) that conduct electricity and can cause a dangerous electric shock, or water freezes the switch?
Cell (+) ── Switch ── (−) · Closed Series Loop
10. In a series circuit, how does the electric current measured at different points around the single loop compare: the current is the SAME at every point in a series loop, or it gets used up by the bulb?
Cell (+) ── Switch ── (−) · Closed Series Loop
11. In a simple SERIES circuit with two bulbs in a single loop, if one bulb’s filament breaks (blows), what happens to the other bulb: it goes out too because the single circuit loop is broken, or it stays lit?
Cell (+) ── Switch ── (−) · Closed Series Loop
12. Which non-metal form of carbon (used in pencil leads) is an exception because it DOES conduct electricity: graphite or rubber?
Cell (+) ── Switch ── (−) · Closed Series Loop
12 questions · Seed 104750 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Conductors, insulators & circuits
Answers and reasoning. Review before teaching.
1. What is the role of the cell or battery in an electrical circuit: it provides the electrical energy (potential difference / voltage) that pushes charges around the circuit, or it absorbs light?
It provides the electrical energy (potential difference / voltage) that pushes charges around the circuit
A cell converts stored chemical energy into electrical energy.
2. Which circuit instrument is connected IN PARALLEL across a component to measure the potential difference (voltage) in volts (V): a voltmeter or an ammeter?
Voltmeter
A voltmeter has very high resistance and is connected across (in parallel with) a component.
3. What happens if two identical cells in a torch are put in facing opposite directions (+ touching +): their voltages cancel out and the bulb will not light, or the bulb shines twice as bright?
Their voltages cancel out and the bulb will not light
Cells in series must be aligned positive-to-negative so their voltages add together.
4. If you add a second cell in series (pointing in the same direction, + to −) to a circuit with a single bulb, what happens to the bulb: it shines more brightly because the voltage pushing the current has doubled, or it goes out?
It shines more brightly because the voltage pushing the current has doubled
Two 1.5 V cells connected correctly in series supply 3.0 V, increasing the current through the bulb.
5. Materials such as copper, aluminium, silver and steel that allow electric current to flow through them easily are called: electrical conductors or electrical insulators?
Electrical conductors
Metals have free-moving (delocalised) electrons that conduct electric current readily.
6. Why are the lights and sockets in a home wired in PARALLEL rather than in series: each light is on its own branch so it receives full voltage and can be switched on or off independently without turning off the others, or parallel uses no wire?
Each light is on its own branch so it receives full voltage and can be switched on or off independently without turning off the others
In a parallel circuit, if one lamp fails or is switched off, current still flows through the other branches.
7. In a standard circuit diagram, what component is represented by a circle with the letter “M” inside it: an electric motor or a buzzer?
Electric motor
A circle with an “M” represents an electric motor that converts electrical energy into kinetic rotation.
8. In a standard circuit diagram, what component is represented by a circle with an “X” (cross) inside it: a filament lamp (bulb) or a battery?
Filament lamp (bulb)
A circle containing a cross is the standard circuit symbol for an indicator or lighting lamp.
9. Why should you NEVER touch mains electrical switches, plugs or sockets with wet hands: tap water contains dissolved salts (ions) that conduct electricity and can cause a dangerous electric shock, or water freezes the switch?
Tap water contains dissolved salts (ions) that conduct electricity and can cause a dangerous electric shock
Impure water is an electrical conductor and lowers the electrical resistance of skin.
10. In a series circuit, how does the electric current measured at different points around the single loop compare: the current is the SAME at every point in a series loop, or it gets used up by the bulb?
The current is the SAME at every point in a series loop
Charge is conserved—the same number of coulombs per second passes every point in a single loop; energy is transferred, not current used up.
11. In a simple SERIES circuit with two bulbs in a single loop, if one bulb’s filament breaks (blows), what happens to the other bulb: it goes out too because the single circuit loop is broken, or it stays lit?
It goes out too because the single circuit loop is broken
A break anywhere in a series loop stops current throughout the entire loop.
12. Which non-metal form of carbon (used in pencil leads) is an exception because it DOES conduct electricity: graphite or rubber?
Graphite
Graphite has delocalised electrons between its carbon layers, allowing it to conduct electricity.
12 questions · Seed 104750 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Conductors, insulators & circuits
Take your time. Show your thinking.
1. What is the role of the cell or battery in an electrical circuit: it provides the electrical energy (potential difference / voltage) that pushes charges around the circuit, or it absorbs light?
Cell (+) ── Switch ── (−) · Closed Series Loop
2. Which circuit instrument is connected IN PARALLEL across a component to measure the potential difference (voltage) in volts (V): a voltmeter or an ammeter?
Cell (+) ── Switch ── (−) · Closed Series Loop
3. What happens if two identical cells in a torch are put in facing opposite directions (+ touching +): their voltages cancel out and the bulb will not light, or the bulb shines twice as bright?
Cell (+) ── Switch ── (−) · Closed Series Loop
4. If you add a second cell in series (pointing in the same direction, + to −) to a circuit with a single bulb, what happens to the bulb: it shines more brightly because the voltage pushing the current has doubled, or it goes out?
Cell (+) ── Switch ── (−) · Closed Series Loop
5. Materials such as copper, aluminium, silver and steel that allow electric current to flow through them easily are called: electrical conductors or electrical insulators?
Cell (+) ── Switch ── (−) · Closed Series Loop
6. Why are the lights and sockets in a home wired in PARALLEL rather than in series: each light is on its own branch so it receives full voltage and can be switched on or off independently without turning off the others, or parallel uses no wire?
Cell (+) ── Switch ── (−) · Closed Series Loop
7. In a standard circuit diagram, what component is represented by a circle with the letter “M” inside it: an electric motor or a buzzer?
Cell (+) ── Switch ── (−) · Closed Series Loop
8. In a standard circuit diagram, what component is represented by a circle with an “X” (cross) inside it: a filament lamp (bulb) or a battery?
Cell (+) ── Switch ── (−) · Closed Series Loop
9. Why should you NEVER touch mains electrical switches, plugs or sockets with wet hands: tap water contains dissolved salts (ions) that conduct electricity and can cause a dangerous electric shock, or water freezes the switch?
Cell (+) ── Switch ── (−) · Closed Series Loop
10. In a series circuit, how does the electric current measured at different points around the single loop compare: the current is the SAME at every point in a series loop, or it gets used up by the bulb?
Cell (+) ── Switch ── (−) · Closed Series Loop
11. In a simple SERIES circuit with two bulbs in a single loop, if one bulb’s filament breaks (blows), what happens to the other bulb: it goes out too because the single circuit loop is broken, or it stays lit?
Cell (+) ── Switch ── (−) · Closed Series Loop
12. Which non-metal form of carbon (used in pencil leads) is an exception because it DOES conduct electricity: graphite or rubber?
Cell (+) ── Switch ── (−) · Closed Series Loop
12 questions · Seed 104750 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Conductors, insulators & circuits
Answers and reasoning. Review before teaching.
1. What is the role of the cell or battery in an electrical circuit: it provides the electrical energy (potential difference / voltage) that pushes charges around the circuit, or it absorbs light?
It provides the electrical energy (potential difference / voltage) that pushes charges around the circuit
A cell converts stored chemical energy into electrical energy.
2. Which circuit instrument is connected IN PARALLEL across a component to measure the potential difference (voltage) in volts (V): a voltmeter or an ammeter?
Voltmeter
A voltmeter has very high resistance and is connected across (in parallel with) a component.
3. What happens if two identical cells in a torch are put in facing opposite directions (+ touching +): their voltages cancel out and the bulb will not light, or the bulb shines twice as bright?
Their voltages cancel out and the bulb will not light
Cells in series must be aligned positive-to-negative so their voltages add together.
4. If you add a second cell in series (pointing in the same direction, + to −) to a circuit with a single bulb, what happens to the bulb: it shines more brightly because the voltage pushing the current has doubled, or it goes out?
It shines more brightly because the voltage pushing the current has doubled
Two 1.5 V cells connected correctly in series supply 3.0 V, increasing the current through the bulb.
5. Materials such as copper, aluminium, silver and steel that allow electric current to flow through them easily are called: electrical conductors or electrical insulators?
Electrical conductors
Metals have free-moving (delocalised) electrons that conduct electric current readily.
6. Why are the lights and sockets in a home wired in PARALLEL rather than in series: each light is on its own branch so it receives full voltage and can be switched on or off independently without turning off the others, or parallel uses no wire?
Each light is on its own branch so it receives full voltage and can be switched on or off independently without turning off the others
In a parallel circuit, if one lamp fails or is switched off, current still flows through the other branches.
7. In a standard circuit diagram, what component is represented by a circle with the letter “M” inside it: an electric motor or a buzzer?
Electric motor
A circle with an “M” represents an electric motor that converts electrical energy into kinetic rotation.
8. In a standard circuit diagram, what component is represented by a circle with an “X” (cross) inside it: a filament lamp (bulb) or a battery?
Filament lamp (bulb)
A circle containing a cross is the standard circuit symbol for an indicator or lighting lamp.
9. Why should you NEVER touch mains electrical switches, plugs or sockets with wet hands: tap water contains dissolved salts (ions) that conduct electricity and can cause a dangerous electric shock, or water freezes the switch?
Tap water contains dissolved salts (ions) that conduct electricity and can cause a dangerous electric shock
Impure water is an electrical conductor and lowers the electrical resistance of skin.
10. In a series circuit, how does the electric current measured at different points around the single loop compare: the current is the SAME at every point in a series loop, or it gets used up by the bulb?
The current is the SAME at every point in a series loop
Charge is conserved—the same number of coulombs per second passes every point in a single loop; energy is transferred, not current used up.
11. In a simple SERIES circuit with two bulbs in a single loop, if one bulb’s filament breaks (blows), what happens to the other bulb: it goes out too because the single circuit loop is broken, or it stays lit?
It goes out too because the single circuit loop is broken
A break anywhere in a series loop stops current throughout the entire loop.
12. Which non-metal form of carbon (used in pencil leads) is an exception because it DOES conduct electricity: graphite or rubber?
Graphite
Graphite has delocalised electrons between its carbon layers, allowing it to conduct electricity.
12 questions · Seed 104750 · Age guidance, not curriculum certification