Please just state the letters that are CORRECT. THANKS! 11. [5pt] Which statemen
ID: 1440750 • Letter: P
Question
Please just state the letters that are CORRECT. THANKS!
11. [5pt]
Which statements are true for two oppositely charged, isolated parallel plates: (C=capacitance, U=stored energy, +Q and -Q = charge on the plates). Note: Isolated plates can not lose their charge. (Give ALL correct answers, i.e., B, AC, BCD...)
A) When the distance is halved, Q stays the same.
B) Inserting a dielectric increases Q.
C) When the distance is doubled, U increases.
D) Inserting a dielectric decreases U.
E) Increasing the distance increases the Electric field.
F) When the distance is doubled, C increases.
G) Inserting a dielectric increases C.
Explanation / Answer
from colombs law F is iversli propotioal to 1/d2
when the distace is halved,force is 4 times :F2=F1d12/(d1/2)2 =4F1
when the distance is 2 times,force is decrease 1/4 times F2=F1d12/2(d12)=1/4 F1
SO all key points are well. and all correct answers