Chapter 16: Problem 28
A hollow metal sphere of radius \(5 \mathrm{~cm}\) is charged such that the potential on its surface is \(10 \mathrm{~V}\). The potential at the centre of the sphere is (a) 0 volt (b) 10 volt (c) same as at a point \(5 \mathrm{~cm}\) away from the surface (d) same as at point \(25 \mathrm{~cm}\) away from the surface
Short Answer
Step by step solution
Understanding Sphere Potential
Inner Potential Consistency
Analyzing Given Problem
Conclusion on Center Potential
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Charged Conductors
- This distribution results in a uniform electric field just outside the conductor. - Inside the conductor, the electric field is zero. This phenomenon ensures that the potential remains the same throughout the conductor’s surface and interior. A conductor in equilibrium, such as our hollow metal sphere, has these distinct properties:
- The electric field inside a perfect conductor is zero. - All excess charges reside on the surface. - The potential inside stays constant, matching the surface potential.
Hollow Sphere
Imagine trying to pick up a ball which is completely hollow inside; any charge you 'place' on it would naturally migrate to the outer layer. This happens because:
- The charges, influenced by forces pushing them outwards, move until they reside solely on the exterior.
- Inside the sphere, both the electric field and potential become uniform.
Uniform Potential
- It means that no energy is needed or work done to move a charge within the conductor.
- All internal points share the same electric potential value as the surface.
Electrostatics
Key aspects of electrostatics include:
- Understanding how and why charges distribute over surfaces.
- Determining electric fields based on charge configurations.
- Exploring electric potentials which help in calculating energy forces in electrostatic situations.