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Class 12 · Physics
→A closed system has total charge +q. In the final state, four parts have charges +2q, −3q, +5q, and an unknown charge. What is the unknown charge?
Class 12 · Physics
→In an isolated system, the charge of one part changes from −3q to +5q. What change must occur in the charge of the remaining system?
Class 12 · Physics
→In charging by induction, if the rod is removed before the earth connection is removed, why is a permanent charge not formed?
Class 12 · Physics
→A negatively charged rod is placed near a neutral conductor, and the conductor is earthed. After the earth connection is removed, the rod is taken away. What charge remains on the conductor?
Class 12 · Physics
→A positively charged rod is brought near a neutral conductor. The conductor is earthed, the earth connection is removed, and finally the rod is removed. What charge remains on the conductor?
Class 12 · Physics
→A free object is said to have a charge of −5.6 × 10^-19 C. Why is this statement wrong?
Class 12 · Physics
→Which of the following charges cannot be possible on a free object?
Class 12 · Physics
→A particle has a charge of −3.84 × 10^-18 C. What is the number of excess electrons?
Class 12 · Physics
→An object has a charge of +2.88 × 10^-18 C. How many electrons has it lost?
Class 12 · Physics
→Four drops have charges of +3e, −5e, +7e, and −1e. They combine into one drop. What is the charge of the new drop?
Class 12 · Physics
→A drop has a charge of −15 elementary charges. It breaks into two drops, one of which has +4 elementary charges. What is the charge on the other drop?
Class 12 · Physics
→A particle has a charge of +7 elementary charges. It first gains 12 electrons and then loses 4 electrons. What is its final charge?
Class 12 · Physics
→Two identical metal spheres initially have charges of +18 C and −10 C. After contact, one sphere is connected to earth. What is the final charge of that sphere?
Class 12 · Physics
→A conducting sphere has a charge of +24 C. It is touched successively with three identical neutral spheres. What final charge remains on the original sphere?
Class 12 · Physics
→Three identical conducting spheres have charges plus twelve coulomb, minus six coulomb and plus three coulomb. If all are brought into contact and separated, what charge will each have?
Class 12 · Physics
→In a closed system the initial total charge is minus four coulomb. After a process, three parts have charges plus six coulomb, minus three coulomb and an unknown charge. What is the unknown charge?
Class 12 · Physics
→What is the most correct conclusion for difficult questions based on electric charge and conservation?
Class 12 · Physics
→Which combined use of charge properties is most useful in numerical questions?
Class 12 · Physics
→If a particle has zero net charge, will it always remain unaffected in every electric process?
Class 12 · Physics
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