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Two large circular metal plates are parallel and nearly touching, only 4 mm apart. The two...

Two large circular metal plates are parallel and nearly touching, only 4 mm apart. The two plates are connected to the opposite terminals of a 12.0 V battery.

(a) What is the average electric field strength in the space between the plates? Give your answer in volts/meter.
  V/m
(b) What is the electric force on a 75.0 nC charge located halfway between the two plates? Give your answer in micronewtons.
μN

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