Concept explainers
(a)
The factor by which the energy stored in the electric field changed.
(a)
Answer to Problem 50P
Twice the original energy stored.
Explanation of Solution
Given:
The parallel plate capacitor has fixed charges
Formula used:
Where,
Moreover, the energy stored in the capacitor is
Where,
Calculation:
The distance between the capacitor plates is doubled.
The change in the energy stored is
(b)
The work done in doubling the distance between the plates.
(b)
Answer to Problem 50P
Explanation of Solution
Given:
The parallel plate capacitor has fixed charges
Formula used:
The capacitance for an air field capacitor is
Where,
Moreover, the energy stored in the capacitor is
Where,
The work done to separate the plates is
Calculation:
The change in enrgy is the subtraction of the final energy stored in the capacitor to the initial energy stored in the capacitor.
Chapter 17 Solutions
Physics: Principles with Applications
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