Question

19. A battery charges an ideal parallel-plate capacitor. The battery remains attached while the two plates of the capacitor are moved further apart to twice the original distance. During this process, the voltage across the capacitor by a factor of a) increases, 4 b) increases, 2 c) decreases, 1/2 d) decreases, 1/4 e) none of the above answers are correct

Answer 1

!1 1 . 19. We know the capacitance of a ideal Parallel plate capacitor, C=ktok d ft IL u bro Where, K= dielectric const of the medium b/w two parallel plates to = permitivity of freespace. Area of plate d = distance b/w two plates If two plates of the capacitor are me moved further apart to twice of the original distance ce new separation distance of two plates d' - 2 d New Capacitace, c' K God As the battery remains attached, voltage remains same also after separation the distance of plate, Charge will be half of to initial value ce a = q excen charge goes back and gets absorb red by the battery. so, loption e) "no the of the above answers are correct is the correct option. 20 2