Q75 / 90 · JEE Main 2024 (05 Apr Shift 2) · Physics

The vehicles carrying inflammable fluids usually have metallic chains touching the ground :

  • A
    To protect tyres from catching dirt from ground
  • B
    To alert other vehicles
  • C
    It is a custom
  • Correct answer
    D
    To conduct excess charge due to air friction to ground and prevent sparking

Solution

Static charge is developed due to air friction. This can result in combustion. So, metallic chains is used to discharge excess charge.

Hence, the correct answer is option: 'D'.

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