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A student records the initial length l, ...

A student records the initial length l, change in termperature `Delta`T and change in length `Delta`l of a rod as foIJows:
`{:("S.No.",Delta T(""^(@)C),l (m), Delta(m)),(1,2,10,4 xx 10^(-4)),(2,1,10,4 xx 10^(-4)),(3,2,20,2 xx 10^(-4)),(4,3,10,6 xx 10^(-4)):}`
lf the first observation is correct, what can you say about observations 2,3 and 4.

A

2 & 3 are correct

B

only 4 is correct

C

2 & 4 are correct

D

3 & 4 are correct

Text Solution

Verified by Experts

The correct Answer is:
B
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