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A thin metal plate of length 25 cm and b...

A thin metal plate of length 25 cm and breadth 4 cm in air carries a charge of `10muC`. Calculate the outward pull on one side of the plate.

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Data: l=25cm, b=4cm, q=10 `mu` C `=10^(-5)C, k=1, epsilon_(0) = 8.85 xx 10^(-12)C^(2)//N.m^(2)`.
A=lb `=25 xx 4=100 cm^(2) = 0.01 m^(2)`
The outward pull on one side of the plate,
`F=sigma^(2)/(2kepsilon_(0)) xx A = ((q//A)^(2)A)/(2kepsilon_(0)) = q^(2)/(2kepsilon_(0)A)`
`=(10^(-5))^(2)/(2(1)(8.85 xx 10^(-12))(0.01))= 10^(5)/(1.77)`
=565 N
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