1.

A circular metallic ring of radius R has a small gap of width d. The coefficient of thermal expansion of the metal isalpha in appropriate units. If we increase the temperature of the ring by a amount DeltaT, then width of the gap –(A)Will increases by an amount dalphaDeltaT

Answer»

Will INCREASES by an amount `d alphaDeltaT`
will not change
Will increases by an amjoint `(2PI R -d) alphaDeltaT`
Will decreases by an amount `dalphaDeltaT`

Answer :A


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