A short chain is sometimes attached to the back of a petrol tanker to?
A
generate more friction
B
ensure the balancing of the tanker
C
caution the driver when overspeeding
D
conduct excess charges to the earth
Verified Correct Answer: D.
Physical Principles & Numerical Solution
The friction between the tanker and air creates charges which the chain conducts to the ground.
Source: WAEC / JAMB / NECO Classroom Archive (Record #14064)