In the shown circuit involving a resistor of resistance R $\Omega$, capacitor of capacitance C farad and an ideal cell of emf E volts, the capacitor is initially uncharged and the key is in position 1. At t = 0 second the key is pushed to position 2 for  $t_0 = RC$ seconds and then key is pushed back to position 1 for  $t_0 = RC$ seconds. This process is repeated again and again. Assume the time taken to push key from position 1 to 2 and vice versa to be negligible.