If C, R, L and I denote capacity,resistance,i | vedclass

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(D) The dimensional formulas are:$[C] = [M^{-1} L^{-2} T^4 A^2]$$[R] = [M L^2 T^{-3} A^{-2}]$$[L] = [M L^2 T^{-2} A^{-2}]$$[I] = [A]$$(1)$ $[CR] = [M^

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$(1)$,$(2)$ and $(3)$ only

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(D) The dimensional formulas are:$[C] = [M^{-1} L^{-2} T^4 A^2]$$[R] = [M L^2 T^{-3} A^{-2}]$$[L] = [M L^2 T^{-2} A^{-2}]$$[I] = [A]$$(1)$ $[CR] = [M^{-1} L^{-2} T^4 A^2] 	imes [M L^2 T^{-3} A^{-2}] = [T^1]$$(2)$ $[L/R] = [M L^2 T^{-2} A^{-2}] / [M L^2 T^{-3} A^{-2}] = [T^1]$$(3)$ $[\sqrt{LC}] = ([M L^2 T^{-2} A^{-2}] 	imes [M^{-1} L^{-2} T^4 A^2])^{1/2} = [T^2]^{1/2} = [T^1]$$(4)$ $[LI^2] = [M L^2 T^{-2} A^{-2}] 	imes [A^2] = [M L^2 T^{-2}]$ (This is energy,not time).Thus,quantities $(1)$,$(2)$,and $(3)$ have the dimensions of time. Hence,option $(d)$ is correct.

If $C, R, L$ and $I$ denote capacity,resistance,inductance and electric current respectively,the quantities having the same dimensions of time are :
$(1)$ $C R$
$(2)$ $\frac{L}{R}$
$(3)$ $\sqrt{L C}$
$(4)$ $L I^2$

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If $C, R, L$ and $I$ denote capacity,resistance,inductance and electric current respectively,the quantities having the same dimensions of time are :$(1)$ $C R$$(2)$ $\frac{L}{R}$$(3)$ $\sqrt{L C}$$(4)$ $L I^2$