The SI unit of capacitance is farad.
The base SI representation of farad is s 4 A 2 m -2 kg -1
The SI unit of resistance is Ohm.
The base SI representation of Ohm is kg m 2 s -3 A -2
Now,
CR = (s 4 A 2 m -2 kg -1 ) (kg m 2 s -3 A -2 )
= s
Thus the dimension of CR is [T]
