Question

Does τ=L/R or R/L please?

Answer 1

What are the units of \(\tau,L,R\))?

Answer 2

τ is in seconds
L is in Henrys
R is in Ohms

Answer 3

a henry, is equal to an Ohm.Second

Answer 4

Ah ok! Thank you! so its R/L ?

Answer 5

Which makes sense:
\[\tau\,[\text s] = L\,[\Omega\cdot\text s]/R\,[\Omega]\]or
\[\tau\,[\text s] = R\,[\Omega]/L\,[\Omega\cdot\text s]\]

Answer 6

the \([\Omega\)]'s cancel . . .

Answer 7

Thank you!

Answer 8

so
\[\tau\,[\text s] =\frac LR\,[\text s]\]or
\[\tau\,[\text s] =\frac RL\,\frac1{[\text s]}\]

Answer 9

\[\tau=L/R\] makes sense

(in the other option, the units didn't cancel away; \(\tau=R/L\), cannot be true because it fails unit analysis )