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Question

The dimensions of intensity are,


A

ML0T-3

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B

M2L1T-2

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C

ML2T-2

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D

M2L2T-3

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Solution

The correct option is A

ML0T-3


The wave's intensity is defined as the energy transferred per unit area per unit of time.

I=EAt

Now substituting the dimensions of energyML2T-2, time[T] and area[L2], we get

I=ML2T-2L2TI=ML0T-3

Therefore the dimensional formula of the intensity ML0T-3.

Hence, the correct option is A.


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