he following constants if necessary. Coulomb constant, k = 8.987 x 10° N m2 /C2. Vacuum permitivity, 8.854 x 10-12 F/m. Magnitude of the Charge of one electron, e = -1.60217662 x 10-1 C. Mass of one electron, 9.10938356 x 10-34 kg. The gravitational acceleration near the surface of Earth g = 9.8 m/s. Unless specified wise, each symbol carries their usual meaning. For example, uC means miero coulomb. ceiling Page 1 L
he following constants if necessary. Coulomb constant, k = 8.987 x 10° N m2 /C2. Vacuum permitivity, 8.854 x 10-12 F/m. Magnitude of the Charge of one electron, e = -1.60217662 x 10-1 C. Mass of one electron, 9.10938356 x 10-34 kg. The gravitational acceleration near the surface of Earth g = 9.8 m/s. Unless specified wise, each symbol carries their usual meaning. For example, uC means miero coulomb. ceiling Page 1 L
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Please read the full question & solve only ( d, e & f ). Take your time & solve correctly.
Thanks.
Transcribed Image Text:Use the following constants if necessary. Coulomb constant, k = 8.987 x 10° N - m² /C?. vacuum permitivity,
En = 8.854 x 10-12 F/m. Magnitude of the Charge of one electron, e = -1.60217662 x 10-19 C. Mass of one electron,
9.10938356 x 10-31 kg. The gravitational acceleration near the surface of Earth g = 9.8 m/s2. Unless specified
otherwise, each symbol carries their usual meaning. For example, uC means micro coulormb.
m.
ceiling
// //
Page 1
step 1: Two small identically charged conducting spheres 1 and 2 of equal mass are hung from a fixed support with non conducting
threads of equal length as shown in the figure. Both the spheres have equal mass m1 = m2 = m and equal charge qi = 92 = q.
Assume that the charge of each sphere is g = 28 nC, the length of the thread is L = 234 cm and the horizontal separation is
x = 17 cm.
You must draw the figure properly in your pdf. The x and y directions are shown in the figure. You have the liberty to choose any point
as the origin of your coordinate system. (Hint: You may find it convenient to choose q or g2 as the origin of your coordinate
system.)
a) Find out the mass of each sphere.
mass of each sphere in S. I. unit
Give your answer to at least three significance digits.
kg
step 2: Now, say we discharge sphere 2, without changing any other variables. Discharging means that the new charge of the sphere
2 is q = 0. Explain what will happen in your script and answer the followings:
b) What will be the new charge of the spheres after they reach equilibrium from step 2.
charge of sphere 1
Give your answer to at least three significance digits.
charge of sphere 2
Give your answer to at least three significance digits.
c) What will be the new separation of the spheres after they reach equilibrium from step 2. Hint: Use small angle approximation.
equilibrium separation
Give your answer to at least three significance digits.
m
Transcribed Image Text:ceiling
page 2
L
92
step 3: Now say we insert another charged sphere 3 in between with a thread of length h which is shown in figure 2. Note that, value
of h is the vertical distance from sphere 1 and 2 to the ceiling. Assume that the charge of sphere 3 is q3 = 3.5 nC. Find the
separation after the system reaches equilibrium from this step. Hint: Use small angle approximation and if you use that then
h → L.
You may not be able to answer (d).(e) before you find (f), but finding expression for (d),(e) are necessary in order to find (f).
d) Find the magnitude of electric force on q due to q2 and call it F21-
magnitude of F2.1
Give your answer to at least three significance digits.
e) Find the magnitude of electric force on q1 due to q3 and call it F3,1
magnitude of F3.1
Give your answer to at least three significance digits.
f) Find the separation after the system reaches equilibrium from step step 3:.
equilibrium separation
Give your answer to at least three significance digits.
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