please help me e.What is the potential 0.39×10-10 m from a proton (the average d
ID: 1877231 • Letter: P
Question
please help me
e.What is the potential 0.39×10-10 m from a proton (the average distance between the proton and electron in a hydrogen atom)?
d. Find the capacitance of a parallel plate capacitor having plates of area 4 m2 that are separated by 0.07 mm of Teflon. Give answer in terms of 10-7 F.
c.A 0.8 F and a 8 F capacitors are connected in series. Then the pair are connected in parallel with a 3.2 F capacitor. What is the equivalent capacitance? Give answer in terms of mF.
b.An electrostatic paint sprayer has a 0.5 m diameter metal sphere at a potential of 32 kV that repels paint droplets onto a grounded object. What charge is on the sphere? Give answer in terms of 10-7 C.
1a. An evacuated tube uses an accelerating voltage of 49 kV to accelerate electrons to hit a copper plate and produce x rays. Non-relativistically,what would be the maximum speed of these electrons? Give answer in terms of 108 m/s.
Explanation / Answer
a) V = kq/r
= 9*10^9 * 1.6*10^-19 / 0.39*10^-10
= 36.92 V
d) C = Aeo / d
= 4*8.85*10^-12 / 0.07*10^-3
= 5.05*10^-7 F
c) capacitorsin series= C1C2 / (C1 + C2)
= 0.8*8 / (0.8+8) = 0.73 F
0.73 F and 3.2 uF are in parallel
C(equi) = 0.73 + 3.2 = 3.93 uF = 0.00392 mF
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