Two identical capacitors A and B of capacitance C each, are charged to the same potential V and are connected in two circuits at t = 0 , as shown in the figure i and ii respectively. The charge on the capacitors at time t = C R are respectively

Step-by-step solution

Time t = C R is known as time constant. It is time in which charge on the capacitor decreases to 1 e times of its initial charge (steady-state charge). In figure (i) PN junction diode is in forward bias, so current will flow in the circuit i.e., charge on the capacitor decrease and in time t it becomes Q = 1 e Q o ; where Q 0 = C V ⇒ Q = C V e In figure (ii) P-N junction diode is in reverse bias, so no current will flow through the circuit hence change on the capacitor will not decay and it remains same i.e.