An Uncharged Parallel Plate Capacitor with an Air Gap Is

An uncharged parallel plate capacitor with an air gap is connected to a 6.0-V battery.After charging,the energy stored in the capacitor is 40 nJ.If each of the plates has an area of 10 cm²,what is the magnitude of the electric field between the plates?

A) 19 V/m
B) 1.5 * 10⁶ V/m
C) 3.0 * 10⁶ V/m
D) 4.2 * 10⁶ V/m
E) 6.0 * 10⁶ V/m

Correct Answer:

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