A Series Circuit Contains A $1.0 - \mathrm { k } \Omega$

Multiple Choice

A series circuit contains a $1.0 - \mathrm { k } \Omega$ resistor, a $5.0 - \mathrm { mH }$ inductor, and an ideal $25 - \mathrm { V }$ power supply. What is the time constant for the circuit?

A) $5.0 \mathrm {~s}$
B) $1.6 \mathrm {~s}$
C) $5.0 \mu \mathrm { s }$
D) $1.6 \mu \mathrm { s }$