A fuel tanker becomes electrically charged as it travels along a highway.
(i) Explain how the moving tanker becomes electrically charged.
(ii) Why does this charge remain on the body of the tanker after it has stopped moving?
(i) Suggest why it is particularly dangerous for a fuel tanker to accumulate an electrical charge.
(ii) To prevent this, a conductive grounding strap is attached to the metal chassis of the tanker so that it touches the road. Explain how this strap prevents the tanker from remaining charged.