Question

If L, C, and R represent physical quantities, inductance, capacitance and
respectively, then the combinations which do not have the dimensions of frequency is:

• A. $\frac{1}{RC}$
• B. $\frac{R}{L}$
• C. $\frac{1}{\sqrt{LC}}$
• D. $\frac{c}{L}$

Answer 1

The correct option is D $\frac{c}{L}$

Here,

Except,

$\frac{c}{L}$ every option has a dimension of Time..

1st and second being time constant for RC and LR circuit.

And 3rd being the time period of oscillation in LC circuit.

Option $\text{D}$ is the correct answer