A square metal plate with a length af0.20 m and with a charge of 9.7x 10 C.
Find the electric field of the square metal plate.
The area of the plate is:
By definition, the charge density is:
where is the charge of the plate.
The electric field of the plate (neglecting side effects) is given as follows (see https://farside.ph.utexas.edu/teaching/316/lectures/node27.html):
where is the vacuum permittivity. Substituting the numbers, obtain:
Answer. .
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