The dimensional formula of latent heat is:

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(A) Latent heat $(L)$ is defined as the heat energy $(Q)$ required per unit mass $(m)$ for a phase change.$L = \frac{Q}{m}$Since heat energy $(Q)$ has

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$[M^0 L^2 T^{-2}]$

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(A) Latent heat $(L)$ is defined as the heat energy $(Q)$ required per unit mass $(m)$ for a phase change.$L = \frac{Q}{m}$Since heat energy $(Q)$ has the dimensions of work or energy,its dimensional formula is $[ML^2 T^{-2}]$.Mass $(m)$ has the dimensional formula $[M]$.Therefore,the dimensional formula of latent heat is:$L = \frac{[ML^2 T^{-2}]}{[M]} = [M^0 L^2 T^{-2}]$

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