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Question

A parallel plate capacitor of capacitance C is charged to a potential V. The flux of the electric field through a closed surface enclosing the space between capacitor plates is

A
CVε0
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B
2CVε0
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C
Zero
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D
CV2ε0
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Solution

The correct option is C Zero
According to Gauss’ law, the flux of electric field through any closed surface is given by the formula, ϕ=qenclosedε0 Where, qenclosed is the charge enclosed by the closed surface.

The two plates of a capacitor have equal and opposite charges. This implies that the net charge enclosed by a closed surface enclosing the capacitor plates will be zero.i.e., qenclosed=0

As the enclosed charge is zero, so there will be no electric flux through this surface.i.e., ϕ=0

Hence, option (c) is the correct answer.
Key concept: Charge distribution on PPC & Gauss’ law.

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