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25 Dec 2020

Two small identical balls P and Q, each of mass gram, carry identical charges and are sus- pended by threads of equal lengths. At equilibrium, they position themselves as shown in Fig.

 

What is the charge on each ball. Given k = 9 × 109 Nm2C-2 and take g = 10 ms-2.

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Two identical small insulating balls are suspended by separate0.24-m threads that are attached to a common point on the ceiling.Each ball has a mass of 7.65 10-4 kg. Initially the balls areuncharged and hang straight down. They are then given identicalpositive charges and, as a result, spread apart with an angle of32° between the threads.
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Two small spheres of mass m and carrying absolute charge qare
suspended by massless threads of length L, as shown. Thedistance
between the anchor points of the threads is equal to d . Atequilibrium,
the two spheres lie in the same horizontal plane, and the threadseach
make an angle ? with the vertical.
1. (1 pt) Assuming the figure is correct and the charges arerepelled from
each other, choose the best answer below:
(a) Both spheres are positively charged
(b) Both spheres are negatively charged
(c) One sphere is negative and one is positive
(d) Both (a) and (b) are possible
(e) None of the above are possible
2. (2 pts) Draw a clear free-body diagram for the leftsphere.
3. (1 pt) What is the horizontal distance between the (centers ofthe) spheres, at equilibrium, in
terms of L, d and/or ? ?
4) (3 pts) What is the magnitude and direction of the electrostaticforce on the left sphere in
terms of m, g, and/or ? ?
5) (3 pts) What is the value of q in ?C, if d = 30 cm, L = 10 cm, ?= 30°, take g = 10 m/s2
and k = 9•109 (N m2/C2), and these are ping-pong balls of mass m =2.7 grams?

Two small spheres of mass m and carrying absolute charge qare
suspended by massless threads of length L, as shown. Thedistance
between the anchor points of the threads is equal to d . Atequilibrium,
the two spheres lie in the same horizontal plane, and the threadseach
make an angle theta with the vertical.

link to graphhttp://i761.photobucket.com/albums/xx259/anu9/Untitled.jpg

1. Assuming the figure is correct and the charges are repelledfrom
each other, choose the best answer below:
(a) Both spheres are positively charged
(b) Both spheres are negatively charged
(c) One sphere is negative and one is positive
(d) Both (a) and (b) are possible
(e) None of the above are possible


3. What is the horizontal distance between the (centers of the)spheres, at equilibrium, in
terms of L, d and/or theta ?

4) (What is the magnitude and direction of the electrostatic forceon the left sphere in
terms of m, g, and/or theta ?

5) What is the value of q in theta C, if d = 30 cm, L = 10 cm,theta = 30°, take g = 10 m/s^2
and k = 9•10^9 (N m^2/C^2), and these are ping-pong balls of mass m= 2.7 grams?

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