Two Parallel Horizontal Plates Are Spaced 0

question 126

Multiple Choice

Two parallel horizontal plates are spaced 0.60 cm apart in air. You introduce an oil droplet of mass 7.4 × 10^-17 kg between the plates. If the droplet carries 5 electronic charges and if there were no air buoyancy, you could hold the droplet motionless between the plates if you kept the potential difference between them at

• A) 5.4 V.
• B) 27 V.
• C) 3.0 V.
• D) 0.54 V.
• E) 0.27 kV.

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