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Author Question: An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up. Now a ... (Read 49 times)

Tazate

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on: Jul 29, 2018
An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up. Now a slab of dielectric material is placed between the plates of the capacitor while the capacitor is still connected to the battery.
 
  After this is done, we find that
  A) the energy stored in the capacitor had decreased.
  B) the voltage across the capacitor had increased.
  C) the charge on the capacitor had increased.
  D) the charge on the capacitor had not changed.
  E) None of these choices is true.

Question 2

If the electric potential in a region is given by V(x) = 6/x2, the x component of the electric field in that region is
 
  A) -12x-3.
  B) -6x.
  C) 12x-3.
  D) 12x.
  E) 6x.


dlook33

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: C

Answer to Question 2

Answer: C


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Tazate

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


dlook33

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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