Question:
Find the energy required to charge a parallel plate condenser of plate separation d and plate area of A , such that the uniform electric field between the plates is E .
Answer:
Energy required = ½ CV2
We know that C = ε0A/d ; V = Ed
Hence, E = ½ CV2 = ½ ε0A/d * (Ed)2 = ½ ε0E2A/d
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