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Assertion : Vehicles containing inflamma...

Assertion : Vehicles containing inflammable materials usually have metallic ropes touching the ground during motion.
Reason : Charge produced by friction causes fire so, metallic ropes touching the ground for discharging for the safety of vehicles.

A

If both Assertion and Reason are true and the Reason is the correct explanation of Assertion

B

If both Assertion and Reason are true but the Reason is not the correct explanation of Assertion

C

If Assertion is true but Reason is false

D

If both both Assertion and Reason are false

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Vehicles carrying highly inflammable materials have chains hanging to the ground. Why is it so?

a. A comb run through one's dry hair attracts small bits of paper. Why? What happens if the hair is wet or if it is a rainy day? (Remember, a paper doesn't conduct electricity.) b. Ordinary rubber is an insulator. But special rubber tyres of aircraft are made slightly conducting. Why is this necessary? c. Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motion. Why? d. A bird perches on a bare high power line, and nothing happens to the bird. A man standing on the ground touches the same line and gets a fatal shock. Why?