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Q.

A dimensionally correct equation _____ be a correct equation, and a dimensionally incorrect equation _____ be incorrect. The words (in order) to be filled in the blank spaces are

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a

may, must

b

must, may

c

must, must

d

may, may

answer is D.

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Detailed Solution

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There are many quantities which have same dimension hence due to this reason it may be possible that an equation which is dimensionally correct is incorrect. e.g.

Kinetic energy =r×F
is dimensionally correct but it is an incorrect relation.

Hence, A dimensionally correct equation may be a correct equation, and a dimensionally incorrect equation must be incorrect.

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