The collision time of the electrons in a metal in the Drude model is τ and their plasma frequency is ωp. If this metal is placed between the plates of a capacitor, the time constant associated with the decay of the electric field inside the metal
1
\(\tau+\frac{1}{\omega_p}\)
2
\(\omega_p \tau^2\)
3
\(\frac{1}{\omega_p^2 \tau}\)
4
\(\frac{\tau}{1+\omega_p \tau}\)