APFIVE Surface Charge on an Isolated Conducting Plate
A conducting plate is placed in a uniform electric field of magnitude E, perpendicular to its surface. The plate is momentarily grounded and then isolated. If the external electric field is subsequently reduced to E/3, what is the resulting surface charge density on the plate?
A
Remains constant at -ε₀E
B
Increases to -3ε₀E
C
Decreases to -ε₀E/3
D
Becomes zero
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