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Q.

Two rods A and B of identical dimensions are at temperatures 30∘C. If A is heated upto 180∘C and B upto T∘C , their lengths became same. The ratio of α of A and B is 4 : 3 then the value of T is

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a

230∘C

b

200∘C

c

100∘C

d

150∘C

answer is D.

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Detailed Solution

detailed_solution_thumbnail

Δℓ1=Δℓ2

ℓ1α1t1=ℓ2α2t2⇒α1α2=t2t1

43=T−30180−30⇒T=230∘C

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