Question 1:

The material that is not a conductor of electricity is plastic.

• Graphite → conductor (form of carbon)

• Steel → conductor (metal)

• Sea water → conductor (contains dissolved salts/ions)

• Plastic → insulator (does not conduct electricity)

Correct answer: D. plastic

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 2:

For a lab demonstration of static electricity using a rod rubbed with a cloth, the rod must hold the charge after rubbing.

• If the rod is a conductor (e.g., metal), the charge will flow through your hand to ground — no visible static effect.

• If the rod is an insulator (e.g., plastic, ebonite, glass), the charge stays on the surface where it was produced, allowing effects like attracting paper or deflecting a electroscope.

Best results are achieved with insulators only.

Correct answer: C. insulators only

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 3:

The correct naming of charges in an atom is:

• Positive charge → proton (found in the nucleus)

• Negative charge → electron (orbits the nucleus)

Matching the table:

• C. proton / electron ✅

The other options are incorrect:

• A: "molecule" is not a negative charge.

• B: "positron" is an antimatter particle, not normally found in atoms.

• D: "electron / atom" — wrong order and "atom" is not a charge.

Correct answer: C.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 4:

The rule for electrostatic forces is:

• Opposite charges (+ and –) → attract

• Like charges (+ and +, or – and –) → repel

Looking at the table:

• + and – → attract

• + and + → repel

That matches option B.

Correct answer: B.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 5:

When two materials are rubbed together, electrons (negative charges) are transferred from one material to the other.

• If the plastic becomes positively charged, it has lost electrons (negative charges).

• Those electrons must have gone to the cloth.

So the transfer is:
Negative charges (electrons) transferred to the cloth.

That matches option B.

Correct answer: B. Negative charges transferred to the cloth.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 6:

If the plastic becomes negatively charged when rubbed with a cloth, that means it has gained electrons (negative charges).

Electrons must have been transferred from the cloth to the plastic.

That means:
Negative charges transferred to the plastic.

That matches option D.

Correct answer: D. Negative charges transferred to the plastic.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 7:

The application that uses static electricity is A. Ink jet printers.

Here's why:

• Ink jet printers (specifically some types, like electrostatic or certain continuous inkjet printers) use static electricity to deflect charged ink droplets onto the paper to form characters or images.

• Radiotherapy treatments use ionizing radiation (X-rays, gamma rays, etc.), not static electricity.

• Mobile phones use electromagnetic waves (radio frequency), not static electricity.

• Loudspeakers use electromagnetism (moving coil in a magnetic field), not static electricity.

Correct answer: A. Ink jet printers

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 8:

The best description of a reasonable potential hazard of static electricity is:

Igniting fuel at a petrol station.

Here's why:

• Possible fatal shock from the spark → Static sparks are typically very low current (microamps to milliamps) and high voltage; they are usually not fatal because the energy is too low to stop the heart. (Not the best answer.)

• Igniting fuel at a petrol station → A static spark can ignite gasoline vapors, causing a fire or explosion. This is a well-documented, real-world hazard in fuel handling.

• Force produced by the spark can knock a person over → False. Sparks do not have enough mechanical force to knock someone over.

• Spark can produce a surge in kitchen appliances and destroy them → Appliances are affected by mains surges (lightning, grid issues), not by tiny static sparks.

Correct answer: B: Igniting fuel at a petrol station.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 9:

The wire connecting a static discharge wrist band to the ground is called an Earth wire (or grounding wire).
It provides a safe path for static charge to flow to the ground, preventing damage to sensitive electronic components.

Correct answer: A. Earth wire.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 10:

When the technician picks up a positive static charge, they have a deficit of electrons (too few negative charges).

To neutralise this:

• Negative charges (electrons) must flow up from the ground (which is neutral or can supply electrons) through the wire to the wrist.

• These electrons combine with the positive charge on the technician, neutralising it.

So the correct description is:

D. Negative charges flow up from the ground to the wrist to neutralise the technician. ✅

(The other options are incorrect because positive charges (protons) do not move in wires — only electrons move.)

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.