A short chain is usually attached to the back of a petrol tanker and trailing behind it so that the
A
petrol tanker is balanced on the road
B
heat generated by friction in the engine can be conducted to the earth
C
charges generated by friction in the tanker are conducted to the earth
D
tanker can move slowly as the chain touches the road surface
E
chain can produce sound in resonance with the noise from the tanker‘s engine
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Big vehicles gets charged because of friction between them and the air rushing past them.This is the reason tankers often have a metal chain dragging along the ground so that charge produced leaks to the ground through chain.
Source: Myschool Past Questions Archive (Record #25020)