What is the current i0 that flows through the resistor immediately after the switch is thrown?

Express your answer in terms of any or all of the quantities q, R, and C.

Answer:- The current I0 that flows through the resistor immediately after the switch is thrown is equal to the charge q divided by the capacitance C. This is because the capacitor is initially uncharged, so the voltage across it is zero. The current is therefore limited only by the resistance R, and is given by I0 = q/C.

I0 = q/C