A pure inductor `L`, a capactior `C` and a resistance `R` are connected across a battery of emf `E` and internal resistance `r` as shows in Fig. Switch `S_(W)` is closed at `t = 0`, select the correct altermative (S).

Options

A. current through resistance `R` is zero all the time
B. current through resistance `R` is zero at `t = 0` and `t rarr oo`
C. maximum charge stored in the capacitor is `CE`
D. maximum charge stored in the inductor is equal to the maximum energy stored in the capacitor

Answer

B

Explanation

At `t = 0`, charge on `C` is zero, so p.d across `C` is zero, p.d
across `R` is also zero. Hence there is no current in `R`.
At `t = oo`, current through `L` is maximum and constant, so
p.d. across `L` is zero, therefore p.d. across `R` is zero. Hence no current in `R`.