wo identical metal spheres A and B placed in contact are supported on insulating stand. What kinds of charge will A and B develop when a negatively charged ebonite rod is brought near A
Question
wo identical metal spheres A and B placed in contact are supported on insulating stand. What kinds of charge will A and B develop when a negatively charged ebonite rod is brought near A
Solution
When a negatively charged ebonite rod is brought near sphere A, the free electrons in sphere A are repelled and move to sphere B due to the negative charge of the ebonite rod. This leaves sphere A with a net positive charge and sphere B with a net negative charge.
Here are the steps:
- The negatively charged ebonite rod is brought near sphere A.
- The free electrons in sphere A are repelled by the negative charge of the ebonite rod.
- These electrons move to sphere B, which is in contact with sphere A.
- This movement of electrons leaves sphere A with a net positive charge (since electrons are negatively charged and their movement away leaves the positively charged protons unbalanced).
- Sphere B, having gained the electrons, develops a net negative charge.
So, sphere A will develop a positive charge and sphere B will develop a negative charge.
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