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Electric force between two identical spheres 2Q and -3Q is F. A third sphere of the same size but uncharged is brought in contact with A and then with B. And finally removed from both. What is new force of attraction between And B in terms of F if the separation between them is same.is the force repulsive or attractive.?
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Most Upvoted Answer
Electric force between two identical spheres 2Q and -3Q is F. A third ...
Is it F/6..if it is,then ansr will be like this
F=-k6Q^2/r^2,,,,if 3rd sphere brought in contact with A then it's charge will be shared.so both A and the New one get charge (2Q+0)/2 =Q,
then with B it will share charge like (Q-3Q)/2=-Q
thenF'=-kQ^2/r^2
that is F'=F/6 and it is attractive.
I think it is like this
Community Answer
Electric force between two identical spheres 2Q and -3Q is F. A third ...
F/6
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Read the passage given below and answer the following questions:Some colloids are stable by their nature, i.e., gels, alloys, and solid foams. Gelatin and jellies are two common examples of a gel. The solid and liquid phases in a gel are interspersed with both phases being continuous. In most systems, the major factor influencing the stability is the charge on the colloidal particles. If a particular ion is preferentially adsorbed on the surface of the particles, the particles in suspension will repel each other, thereby preventing the formation of aggregates that are larger than colloidal dimensions. The ion can be either positive or negative depending on the particular colloidal system, i.e., air bubbles accumulate negative ions, sulphur particles have a net negative charge in a sulphur sol, and the particles in a metal hydroxide sol are positively charged. Accumulation of charge on a surface is not an unusual phenomenon-dust is attracted to furniture surfaces by electrostatic forces. When salts are added to lyophobic colloidal systems the colloidal particles begin to form larger aggregates and a sediment forms as they settle. This phenomenon is called flocculation, and the suspension can be referred to as flocculated, or colloidally unstable. If the salt is removed, the suspension can usually be restored to its original state; this process is called deflocculation or peptization. The original and restored colloidal systems are called deflocculated, peptized, or stable sols. Why does a small amount of salt have such a dramatic effect on the stability of a lyophobic colloidal system? The answer lies in an understanding of the attractive and repulsive forces that exist between colloidal particles. Van der Waals forces are responsible for the attractions, while the repulsive forces are due to the surface charge on the particles. In a stable colloid, the repulsive forces are of greater magnitude than the attractive forces. The magnitude of the electrical repulsion is diminished by addition of ionized salt, which allows the dispersed particles to aggregate and flocculate. River deltas provide an example of this behaviour. A delta is formed at the mouth of a river because the colloidal clay particles are flocculated when the freshwater mixes with the salt water of the oceanQ. Colloidal solutions are stable due to

Electric force between two identical spheres 2Q and -3Q is F. A third sphere of the same size but uncharged is brought in contact with A and then with B. And finally removed from both. What is new force of attraction between And B in terms of F if the separation between them is same.is the force repulsive or attractive.?
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Electric force between two identical spheres 2Q and -3Q is F. A third sphere of the same size but uncharged is brought in contact with A and then with B. And finally removed from both. What is new force of attraction between And B in terms of F if the separation between them is same.is the force repulsive or attractive.? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Electric force between two identical spheres 2Q and -3Q is F. A third sphere of the same size but uncharged is brought in contact with A and then with B. And finally removed from both. What is new force of attraction between And B in terms of F if the separation between them is same.is the force repulsive or attractive.? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Electric force between two identical spheres 2Q and -3Q is F. A third sphere of the same size but uncharged is brought in contact with A and then with B. And finally removed from both. What is new force of attraction between And B in terms of F if the separation between them is same.is the force repulsive or attractive.?.
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