Magyar Information Contest Journal Articles

# Problem P. 4019. (November 2007)

P. 4019. A parallel plate condenser of charge Q consists of two vertical square-shaped plates of sides a, which are at a distance of d. Between the plates, parallel to them, there is another square-shaped metal plate which has the same size as the plates of the condenser and its width is d/3. Find the work done while this plate of density is pulled out of the plates.

(5 pont)

Deadline expired on 11 December 2007.

### Statistics:

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 73 students sent a solution. 5 points: 53 students. 4 points: 8 students. 3 points: 3 students. 2 points: 4 students. 1 point: 4 students. Unfair, not evaluated: 1 solution.

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