AP EAMCET2011PhysicsAlternating Current
A constant voltage of 25 ~V is applied to a series L-R circuit at t=0 , by closing a switch. What is the potential difference across the resistor and the inductor at time t=0 ?
Options
- A0 ~V , 25 ~V
- B12.5 ~V , 1.25 ~V
- C10 ~V , 15 ~V
- D25 ~V , 0 ~V
Correct answer
A. 0 ~V , 25 ~V
Step-by-step solution
At, t=0 , switch closes Current i=i₀ [1-e^ -t R / L ] So, at t=0, i=0 So, potential across inductor =25 ~V and across resistor =0 ~V