NEEDED: conceptual explanations to these answers (These are the correct answers
ID: 1325740 • Letter: N
Question
NEEDED: conceptual explanations to these answers (These are the correct answers from the answer key, but I don't understand WHY). Thank you!
(13) "Doubling potential difference across a capacitor does not change the capacitance of the capacitator"
(8) A charge +Q is placed inside a balloon and the balloon is inflated. As the radius of the balloon r increases the flux of the electric field through the surface of the balloon: ANS: "Stays the same"
(6) A hollw metallic sphere with radius of 10cm has a small object with a charge of +10uC carfeully placed at the center of the sphere. The sphere itself carries a charge o f-10uC. What charge resides on the outer surface of the sphere?: ANS: "Zero"
Explanation / Answer
13)
Q=CV
C IS capacitance it depends only on physical properties
when potential difference is doubled charge gets doubled
because charge is directly propotional to voltage
8)
according to gauss law flux throygh any closed surface=charge enclosed by the surface
flux=Q/epsilon
it does not depends radius or distance
6)
this concept is similar to spherical capacitor
inner object is carrying 10uc according to induction concept
it induces negative charge on other surface
total amount of charge becomes=Q1+Q2
=10-10
=0
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