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 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
2. In a simple SERIES circuit containing one battery and two bulbs, if you add a third identical bulb in the same single loop, what happens to the brightness of the bulbs: they become dimmer because the voltage is shared and total resistance increases, or they become three times brighter?
Cell (+) ── Switch ── (−) · Closed Series Loop
3. What circuit component allows current to flow in ONE direction only (and emits light when it is an LED): a diode (or light-emitting diode) or a fixed resistor?
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. For an electric current to flow and light up a bulb, what kind of path must the circuit form from one terminal of the battery to the other: a complete (closed) loop with no gaps, or a broken (open) loop?
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. 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. 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. 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
10. Materials such as plastic, rubber, glass and dry wood that do NOT allow electric current to flow through them are called: electrical insulators or electrical conductors?
Cell (+) ── Switch ── (−) · Closed Series Loop
11. 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
12. 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 questions · Seed 48 · 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 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.
2. In a simple SERIES circuit containing one battery and two bulbs, if you add a third identical bulb in the same single loop, what happens to the brightness of the bulbs: they become dimmer because the voltage is shared and total resistance increases, or they become three times brighter?
They become dimmer because the voltage is shared and total resistance increases
In a series loop, adding more bulbs increases resistance and splits the battery voltage across more components.
3. What circuit component allows current to flow in ONE direction only (and emits light when it is an LED): a diode (or light-emitting diode) or a fixed resistor?
Diode (or light-emitting diode)
A diode has low resistance in the forward direction and very high resistance in reverse.
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. For an electric current to flow and light up a bulb, what kind of path must the circuit form from one terminal of the battery to the other: a complete (closed) loop with no gaps, or a broken (open) loop?
A complete (closed) loop with no gaps
Current only flows around a continuous, closed conducting pathway.
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. 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. 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. 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.
10. Materials such as plastic, rubber, glass and dry wood that do NOT allow electric current to flow through them are called: electrical insulators or electrical conductors?
Electrical insulators
Insulators have tightly bound electrons and block the flow of electric current.
11. 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.
12. 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 questions · Seed 48 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 10-12
Conductors, insulators & circuits
Take your time. Show your thinking.
1. 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
2. In a simple SERIES circuit containing one battery and two bulbs, if you add a third identical bulb in the same single loop, what happens to the brightness of the bulbs: they become dimmer because the voltage is shared and total resistance increases, or they become three times brighter?
Cell (+) ── Switch ── (−) · Closed Series Loop
3. What circuit component allows current to flow in ONE direction only (and emits light when it is an LED): a diode (or light-emitting diode) or a fixed resistor?
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. For an electric current to flow and light up a bulb, what kind of path must the circuit form from one terminal of the battery to the other: a complete (closed) loop with no gaps, or a broken (open) loop?
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. 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. 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. 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
10. Materials such as plastic, rubber, glass and dry wood that do NOT allow electric current to flow through them are called: electrical insulators or electrical conductors?
Cell (+) ── Switch ── (−) · Closed Series Loop
11. 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
12. 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 questions · Seed 48 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 10-12
Conductors, insulators & circuits
Answers and reasoning. Review before teaching.
1. 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.
2. In a simple SERIES circuit containing one battery and two bulbs, if you add a third identical bulb in the same single loop, what happens to the brightness of the bulbs: they become dimmer because the voltage is shared and total resistance increases, or they become three times brighter?
They become dimmer because the voltage is shared and total resistance increases
In a series loop, adding more bulbs increases resistance and splits the battery voltage across more components.
3. What circuit component allows current to flow in ONE direction only (and emits light when it is an LED): a diode (or light-emitting diode) or a fixed resistor?
Diode (or light-emitting diode)
A diode has low resistance in the forward direction and very high resistance in reverse.
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. For an electric current to flow and light up a bulb, what kind of path must the circuit form from one terminal of the battery to the other: a complete (closed) loop with no gaps, or a broken (open) loop?
A complete (closed) loop with no gaps
Current only flows around a continuous, closed conducting pathway.
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. 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. 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. 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.
10. Materials such as plastic, rubber, glass and dry wood that do NOT allow electric current to flow through them are called: electrical insulators or electrical conductors?
Electrical insulators
Insulators have tightly bound electrons and block the flow of electric current.
11. 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.
12. 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 questions · Seed 48 · Age guidance, not curriculum certification