1.

Which of the following have dimensions of frequency?

Answer»

`(1)/(sqrt(LC))`
`(R)/(C)`
`(R)/(L)`
`(1)/(RC)`

Solution :`(1)/(sqrt(LC)` is resonance frequency of LC oscillator, VLC hence option (a) is correct.
L//R is time constant of LR circuit and hence INVERSE of it `R//L` must be having dimensions of frequency. Hence, option (c) is correct.
RC is time constant of standard RC circuit and hence inverse of it `(1)/(RC)` must be having dimensions of frequency. Hence, option (d) is correct. Options (a), (c) and (d) are correct.


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