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Question

The velocity v of a particle depends upon the time t according to the equation v=a+bt+cd+t. What is the dimension of c ?

A
c=[L]
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B
c=[T]
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C
c=[M]
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D
c=[ML]
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Solution

The correct option is D c=[L]
From the principal of homogeneity,
[a]=[v]or[a]=[LT1]
[bt]=[v]or[b]=[v][t]=[LT1][T]
or, [b]=[LT2]
Similarly, [d]=[t]=[T]
Further, [c][d+t]=[v]or[c]=[v][d+t]
or, [c]=[LT1][T]or[c]=[L]

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