1. why do not the iron fillings get attracted towards a straight current carrying conductor but align along its magnetic field?? 2. prove magnetic lines of force going from south to north internally??give reasons thnx
You have to remember your not driving on your aircraft tires. A bald tire has more of a risk of blowing out on touchdown. On dry pavement a bald tire will do the same a one with tread. In wet conditions the bald tire will not have the performance of one that has thread.
Well, since most aircraft tires do not have a tread like automobile tires do, I guess your debate would be kind of pointless. Aircraft tires are mostly bald with only two or three medium depth grooves running around the circumference of the tire. Larger aircraft do not depend on tires and brakes to slow down after landing. That's what the thrust reversers are for.
1. There is nothing in the wire to attract the filings but the electrons moving through the wire do trail a magnetic effect which is around the wire and this does align the iron filings. 2. This must be hard to prove for a solid bar of iron magnet. But an copper coil carrying a current has the same external field as a bar magnet and, with a hollow core can have plotting compasses placed inside and they line up to show that the field inside such a coil does indeed run form South to North.
bald tire will slide/ slip. Full thread tire will not slide
