please show work In a Millikan oil drop experiment, if the electric field betwee

Question

please show work

In a Millikan oil drop experiment, if the electric field between the plates is adjusted properly, it can exactly balance the weight of the drop. Suppose a tiny spherical oil droplet of radius 1.8 times 10^-4 cm carries a charge equivalent to two electrons, or -2e. What voltage must be placed across the plates to balance the oil drop if the density of oil is 0.664 g/cm^3. The plates are 0.4 centimeters apart. 3.73 times 10^5 volts 1.49 times 10^3 volts 9.31 times 10^5 volts not given 2.98 times 10^3 volts Which drawing depicts the net field of a tiny negatively charged conducting sphere in the gap of two charged parallel plates? not given Electrons in a particle beam each have a kinetic energy of 6.4 times 10^-17 J. If the electrons are traveling parallel to the field lines, what magnitude electric field will stop them in a distance of 0.08 meters? not given 9.48 times 10^5 N/C 5times 10^3 N/C 3.2 times 10^1 N/C 1.19 times 10^7 N/C

Explanation / Answer

6. Volume of sphere = 4 pi r^3 / 3

=4 x pi x (1.8 x 10^-4)^3 / 3

= 2.443 x 10^-11 cm^3

m = volume x density

= 1.622 x 10^-11 g = 1.622 x 10^-14 kg

so Fe - m g = 0

q E = m g

(2 x 1.6 x 10^-19) E = (1.622 x 10^-14) (9.8)

E = 4.97 x 10^5 V/m

V = E.d = 1987 Volt

Ans: Not given

7. (b)

8. Work done = change in KE

and work done = q deltaV = q E d

q E d = change in KE

1.6 x 10^-19 x E x 0.08 = 6.4 x 10^-17

E = 5000 N/C = 5 x 10^3 N/C

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