A series circuit consists of a resistor and capacitor of resistance R ohms and capacitance C Farads. It has the battery as a source of E volts. When the switch is closed the capacitor begins to charge and the total charge on the capacitor at any time q (t) is governed by: dq(t)/dt+(1/RC)q(t)=E/R where R, C, E are taken as constant. Find the charge q (t) across the capacitor at any time t. Hence show that as t → ∞, E = q(t)/c (Note that at t=0,q(t)=0)

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A series circuit consists of a resistor and capacitor of resistance R ohms and capacitance C Farads.  It has the battery as a source of E volts.  When the switch is closed the capacitor begins to charge and the total charge on the capacitor at any time q (t) is governed by: dq(t)/dt+(1/RC)q(t)=E/R   where R, C, E are taken as constant.  Find the charge q (t) across the capacitor at any time t.  Hence show that as t → ∞, E = q(t)/c

(Note that at t=0,q(t)=0)

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