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**Vinod** $L\frac{dI}{dt}+RI=E$

In this equation, I is the current, R is the resistance, L is the inductance, and E is the electromotive force (voltage).

A) Solve the differential equation given a constant voltage $E_0$

B)Use the result of Exercise A) to find the equation for the current if I(0)=0,$E_0$=110volt, R=550 ohms, and L=4 henrys.

When does the current reach 90% of its limiting value?

Answer:

I am trying to answer these questions. But if any member knows the answer he may reply.