An Ideal Air-Filled Parallel-Plate Capacitor with Horizontal Plates Has a Plate

An ideal air-filled parallel-plate capacitor with horizontal plates has a plate separation of 5.0 cm.If the potential difference between the plates is 2000 V,with the top plate at the higher potential,what are the magnitude and direction of the $\vec { E }$ field between the plates?

A) 100 N/C upward
B) 100 N/C downward
C) 40000 N/C upward
D) 40000 N/C downward

Correct Answer:

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