Question

In general, metallic ropes are suspended on the carrier which take inflammable material. What is the reason?

Answer 1

We know that friction is the method of charging. Charges induced on the surface when the two bodies are rubbed with each other due to the transfer of electrons. And inflammable materials are those materials which can set to fire easily.

Complete answer:
When two bodies are rubbed with each other, charges are induced i.e. positive charge and negative charge are induced simultaneously in equal amounts due to the transfer of electrons.
Inflammable materials are those which can catch fire easily. For example- petrol, diesel etc.
In general, metallic ropes are suspended on the carrier which take inflammable material to keep the body of the carrier in contact with the earth. Due to the friction, spark can be generated hence metallic wires are used which are connected to the earth causing earthing and prevent accidents.
Basically, metallic ropes provide a path to charge induced on the surface of carriers to keep the body in contact with the earth. The carrier takes the inflammable material which can easily set to fire, to avoid this metallic ropes are suspended which carry the charge induced and transfer it to the earth.
This is the explanation of using metallic ropes on the carrier taking inflammable material.

Note:
Whenever friction occurs, charges are induced. The positive charges are equal to negative charges and they appear simultaneously. To avoid the spark ignition due to friction, the metallic ropes are used and cause earthing. This is done to ensure safety precautions and this helps to avoid accidents.