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Grade: 12

                        

Why electric field at the centre of a disc is not zero?

Why electric field at the centre of a disc is not zero?

3 years ago

Answers : (1)

Sanjay Deshmukh
27 Points
							
  1. Divide the disc into concentric rings with centre of the disc taken as common centre for all rings.
  2.  We know, electric field at the centre of a ring is 0.
  3. Hence electric field due to all the possible concentric rings at the centre would be 0.
  4. BUT
  5. There would still be a charge left due to a small point charge at the centre of the disc which would not be taken as a ring.
  6. Hence it would constitute some charge which is why electric field is generated.
3 years ago
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