Parallel-Plate Capacitors: the Electric Field Between Square the Plates of a Parallel-Plate

question 50

Multiple Choice

Parallel-plate capacitors: The electric field between square the plates of a parallel-plate capacitor has magnitude E. The potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. The magnitude of the electric field between the plates is now equal to

• A) 4E.
• B) 2E.
• C) E.
• D) E/2.
• E) E/4.

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