Question on Electricity

[alamin]

A Coil with an inductance of 20 H and a resistance of 10 Ohms is connected in series with a battery of emf 12 V and a switch. Calculate the
a. rate of change current and the final current.
b. current after 3.0 seconds.

[Mk]

You should post in the Homework section next time, and you need to provide what you have done so far with the problem, and what equations/formulas you can plug-in/apply.