Answer all questions! 1.) What is the potential 0.44×10-10 m from a proton (the

Question

Answer all questions!

1.) What is the potential 0.44×10-10 m from a proton (the average distance between the proton and electron in a hydrogen atom)?

2.) What is the strength of the electric field between two parallel conducting plates separated by 6 cm and having a potential difference (voltage) between them of 3.8 ×104 V ? Give answer in terms of 106 V/m.

3.) A 0.32 cm diameter plastic sphere, used in a static electricity demonstration, has a uniformly distributed 34 pC charge on its surface.What is the potential near its surface?

Explanation / Answer

1) Potential = Kq/r = 9x109 x 1.6 x 10-19 /(0.44x10-10) = 32.73V

2) Electric field = 3.8x104/0.06=0.633 x 106 V/m

3) Potential = KQ/r = 9x109 x 34x 10-12 /0.0016 = 191.25 V

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