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 10-12
Conductors, insulators & circuits
Take your time. Show your thinking.
1. 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
2. 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
3. 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
4. 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
5. 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
6. Which circuit instrument is connected IN SERIES in a loop to measure the electric current in amperes (A): an ammeter or a voltmeter?
Cell (+) ── Switch ── (−) · Closed Series Loop
7. 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
8. 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
9. 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
10. In a standard circuit diagram, what does a long thin vertical line paired with a shorter, thicker vertical line represent: a single electrical cell, or an open switch?
Cell (+) ── Switch ── (−) · Closed Series Loop
11. Why are electrical wires made with a copper metal core on the inside and a flexible plastic coating on the outside: copper conducts the electricity while the plastic insulator prevents electric shocks and short circuits, or plastic conducts electricity?
Cell (+) ── Switch ── (−) · Closed Series Loop
12. 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
12 questions · Seed 104738 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 10-12
Conductors, insulators & circuits
Answers and reasoning. Review before teaching.
1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. Which circuit instrument is connected IN SERIES in a loop to measure the electric current in amperes (A): an ammeter or a voltmeter?
Ammeter
An ammeter has very low resistance and is placed in series so all the current flows through it.
7. 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.
8. 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.
9. 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.
10. In a standard circuit diagram, what does a long thin vertical line paired with a shorter, thicker vertical line represent: a single electrical cell, or an open switch?
Single electrical cell
The long line marks the positive (+) terminal and the short thick line marks the negative (−) terminal of a cell.
11. Why are electrical wires made with a copper metal core on the inside and a flexible plastic coating on the outside: copper conducts the electricity while the plastic insulator prevents electric shocks and short circuits, or plastic conducts electricity?
Copper conducts the electricity while the plastic insulator prevents electric shocks and short circuits
The metal core carries current; the outer plastic sheath keeps users safe.
12. 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.
12 questions · Seed 104738 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 10-12
Conductors, insulators & circuits
Take your time. Show your thinking.
1. 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
2. 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
3. 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
4. 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
5. 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
6. Which circuit instrument is connected IN SERIES in a loop to measure the electric current in amperes (A): an ammeter or a voltmeter?
Cell (+) ── Switch ── (−) · Closed Series Loop
7. 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
8. 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
9. 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
10. In a standard circuit diagram, what does a long thin vertical line paired with a shorter, thicker vertical line represent: a single electrical cell, or an open switch?
Cell (+) ── Switch ── (−) · Closed Series Loop
11. Why are electrical wires made with a copper metal core on the inside and a flexible plastic coating on the outside: copper conducts the electricity while the plastic insulator prevents electric shocks and short circuits, or plastic conducts electricity?
Cell (+) ── Switch ── (−) · Closed Series Loop
12. 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
12 questions · Seed 104738 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 10-12
Conductors, insulators & circuits
Answers and reasoning. Review before teaching.
1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. Which circuit instrument is connected IN SERIES in a loop to measure the electric current in amperes (A): an ammeter or a voltmeter?
Ammeter
An ammeter has very low resistance and is placed in series so all the current flows through it.
7. 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.
8. 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.
9. 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.
10. In a standard circuit diagram, what does a long thin vertical line paired with a shorter, thicker vertical line represent: a single electrical cell, or an open switch?
Single electrical cell
The long line marks the positive (+) terminal and the short thick line marks the negative (−) terminal of a cell.
11. Why are electrical wires made with a copper metal core on the inside and a flexible plastic coating on the outside: copper conducts the electricity while the plastic insulator prevents electric shocks and short circuits, or plastic conducts electricity?
Copper conducts the electricity while the plastic insulator prevents electric shocks and short circuits
The metal core carries current; the outer plastic sheath keeps users safe.
12. 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.
12 questions · Seed 104738 · Age guidance, not curriculum certification