March 30, 2017

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A small droplet of oil with mass of 1.84×10-15 kg is held suspended in a region of uniform electric field directed upward with a magnitude of 6625 N/C.
Is the excess charge on the droplet positive or negative? NEGATIVE

b.How many excess elementary charges reside on the droplet? (The elementary charge is e = 1.60×10-19 C.)

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