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What I think is : The protons are present at the centre of the atom with rotating electrons around it so when it is rubbed by fur the electrons get passed from the ebonite rod to the fur leaving the rod negatively charged. But in reality the rod is negatively charged Why ? $\endgroup$ 1An ebonite rod is rubbed with fur. Explain the charging of the ebonite rod and the fur on the basis of electron movement. An Ebonite rod is rubbed with fur. Explanation Suppose an ebonite rod has 7 protons and 7 electrons and fur has 10 electrons and 10 protons. On rubbing together, fur loses 2 electrons and ebonite rod gains 2 electrons. Now fur has 8 electrons and 10 protons which makes it positively charged. The ebonite rod has 9 electrons and 7 protons making it negatively charged. Concept: Static Electricity Is there an error in this question or solution?
Physics WAEC 1998 If an ebonite rod is rubbed with fur
No official explanation is available for this question at this time. Please check contributions posted by others below. If you can provide an explanation to help other student learn, please click here Report an Error Ask A Question Download App Answer  Hint: When an ebonite rod and fur are rubbed against each other, electrons from one surface get transferred to another surface. This transfer of electrons leads to excess of electrons on one surface while deficiency of electrons on another. The surface with excess electrons becomes negatively charged whereas the surface with deficiency of electrons becomes positively charged. Use these basics to answer this question. Complete step by step answer: When an ebonite rod is rubbed with fur, a chemical bond is formed between some parts of rod and fur. The electrons in the rod are more tightly bound as compared to fur. Thus, when they are rubbed against each other, electrons from fur are donated to the rod. As the rod is a bad conductor of electricity, the electrons from the rod do not come out. Now, the rod has excess electrons which makes it negatively charged. While the fur becomes deficient of electrons which makes it positively charged.Hence, when an ebonite rod is rubbed with fur, the charge acquired by the fur is positive.So, the correct answer is option A i.e. positive. Note: The charge on fur is equal and opposite to the charge on ebonite rod. This same phenomenon can be seen when an ebonite rod is rubbed with wool. If a glass rod is rubbed with silk cloth, the rod loses electrons which moves to silk cloth. This causes deficiency of electrons in glass rod which makes it positively charged whereas the silk cloth gains excess electrons due to which it becomes negatively charged. |
When ebonite rod is rubbed with fur
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