number 1 1) (10 points) A piece of plastic has a net charge of 2.00 JC How many

Question

number 1

1) (10 points) A piece of plastic has a net charge of 2.00 JC How many more protons than electrons does this piece of plastic have? 2) (30 points) In the figure, a proton is projected horizontally midway between two parallel plates that are separated by 0.50 em. The electrical field due to the plates has magnitude 610,000 N/C between the plates away from the edges. If the plates are 5.60 cm long, find the minimum speed of the proton if it just misses the lower plate as it emerges from the field

Explanation / Answer

One coulomb is 6.28 * 10**18 electrons, so one microcoulomb is one millionth that
amount, or 6.28 * 10**12 electrons If the plastic has a charge of two µC
then its charge is twice 6.28 * 10**12, or 1.256 * 10**13 unit charges. Since its net
charge is positive, it has 1.256 * 10**13 more protons than electrons.

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