What is the difference b/w the two?Derive the relation for the charging current in an LR circuit ,i.e I(t)=E/R(1-E)^-t/Tau(L) and Derive the relation for the time dependence for charging current in an LR circuit?

What do YOU think ?
While we're happy to HELP we wont do all the work for you.
Show us what you have done and where you are having problems..

I am just asking about the difference b/w the two questions I mentioned?

Homework rules (and this IS homework) prohibits anyone on this sit from doing your assignment for you. And you have shown us no answer or work and no reason why you believe that is the answer.

This is not something you woke up wondering one day. Its also CLEARLY phrased as a homework assignment question.