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A Pair of Parallel Plates,forming a Capacitor,are Charged

Question 3

Multiple Choice

A pair of parallel plates,forming a capacitor,are charged.The plates are pulled apart to triple the original separation,the charges on the plates remaining the same.What is the ratio of the final energy stored to the original energy stored?


A) 9
B) 3
C) 1
D) 1/3
E) ​1/9

Correct Answer:

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