L,C and R represent the physical quantities inductance, capacitance and resistance respectively. Which of the following combinations have dimensions of frequency?

Options

A. `RL^(-1)`
B. `R^(-1)L^(-1)`
C. `L^(-1//2)C^(-1/2)`
D. RCL

Answer

A, C

Explanation

`fL=(1)/(dt) xx (V)/((di//dt))=(V)/(di)`
`[fL]=[R] implies (L)/(R) = t`
`RC=t`
Multiply: `LC=t^(2)`
`t=sqrt(LC) implies f= (1)/(t) = L^(-1//2)C^(-1//2)`.