5. In a Millikan-type experiment, two horizontal parallel plates are 1.0 cm apart. A sphere of mass 2.2 x 10-13 kg remains stationary when the potential difference between the plates is 350 V with the upper plate negative. a) Is the sphere positively or negatively charged? Explain. b) Calculate the magnitude of charge on the sphere. c) Is there an excess or deficit of electrons on the sphere? by how many?

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5. In a Millikan-type experiment, two horizontal parallel plates are 1.0 cm apart. A sphere of mass
2.2 x 10-¹3 kg remains stationary when the potential difference between the plates is 350 V with the
upper plate negative.
a) Is the sphere positively or negatively charged? Explain.
b) Calculate the magnitude of charge on the sphere.
c) Is there an excess or deficit of electrons on the sphere? by how many?
Transcribed Image Text:5. In a Millikan-type experiment, two horizontal parallel plates are 1.0 cm apart. A sphere of mass 2.2 x 10-¹3 kg remains stationary when the potential difference between the plates is 350 V with the upper plate negative. a) Is the sphere positively or negatively charged? Explain. b) Calculate the magnitude of charge on the sphere. c) Is there an excess or deficit of electrons on the sphere? by how many?
4. An alpha particle with a charge of +2e is fixed at the origin. A proton is aimed at the alpha particle and
shot at it from a distance of 2 m away at a speed of 3.64 x 10 m/s.
How close will the proton come to the alpha particle before coming to a stop?
Transcribed Image Text:4. An alpha particle with a charge of +2e is fixed at the origin. A proton is aimed at the alpha particle and shot at it from a distance of 2 m away at a speed of 3.64 x 10 m/s. How close will the proton come to the alpha particle before coming to a stop?
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