Short Answer
An ideal, isolated, air-filled parallel-plate capacitor is not connected to a battery but has equal and opposite charges of 3.9 nC on its plates. The separation between the plates initially is 1.2 mm, and for this separation the capacitance is 3.1 × 10-11 F. How much work must be done to pull the plates apart until their separation becomes 7.7 mm? (ε0 = 8.85 × 10-12 C2/N ∙ m2)
Correct Answer:

Verified
Correct Answer:
Verified
Q4: A 12.6-µF isolated capacitor is constructed with
Q5: An ideal parallel-plate capacitor having circular
Q7: A uniform electric field, with a magnitude
Q8: Each plate of an ideal air-filled
Q10: A 6.9 μC negative point charge
Q11: A very small 4.8-g particle carrying
Q13: An electron is released from rest at
Q65: An ideal air-filled parallel-plate capacitor with horizontal
Q110: If a Cu<sup>2+</sup> ion that is initially
Q114: The square plates of a 3000-pF parallel-plate