A) \[VC,\,VC\]
B) \[\frac{VC}{e},\,\,VC\]
C) \[VC,\,\,\frac{VC}{e}\]
D) \[\frac{VC}{e},\,\,\frac{VC}{e}\]
Correct Answer: B
Solution :
Time \[t=CR\] is known as time constant. It is time in which charge on the capacitor decreases to \[\frac{1}{e}\] times of its initial charge (steady state charge). In figure (i) p-n junction diode is in forward bias, so current will flow in the circuit, ie, charge on the capacitor decrease and in time to it becomes\[Q=\frac{1}{e}({{Q}_{0}})\]. where\[{{Q}_{0}}=CV\]and\[Q=\frac{CV}{e}\] In figure (ii) \[p-n\] junction diode is in reverse bias so no current will flow through the circuit hence charge on capacitor will not decay and it remains same ie, \[CV\]after time\[t\].
You need to login to perform this action.
You will be redirected in
3 sec
