A) 200 and 180 V
B) 180 and 135 V
C) 160 and 80 V
D) 140 and 20 V
Correct Answer: B
Solution :
\[V={{V}_{0}}({{e}^{-\lambda t}})\] After 1 seconds \[{{V}_{1}}=320({{e}^{-\lambda }})\Rightarrow 240=320({{e}^{-\lambda }})\,\Rightarrow \,{{e}^{-\lambda }}=\frac{3}{4}\] After 2 seconds \[{{V}_{2}}=320\,{{({{e}^{-\lambda }})}^{2}}=320\times {{\left( \frac{3}{4} \right)}^{2}}=180\,\,volt\] After 3 seconds \[{{V}_{3}}=320\,{{({{e}^{-\lambda }})}^{3}}=320\times {{\left( \frac{3}{4} \right)}^{3}}=135\,\,volt\]You need to login to perform this action.
You will be redirected in
3 sec