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An electron is projected with a velocity...

An electron is projected with a velocity of `1.186xx10^(7)m//s` at an angle `theta` with the x-axis, towards a large metallic plate kept 0.44 mm away from the electron. The plate has a surface charge density `-2xx10^(-6)C//m^(2)`. Find the minimum value of `theta`, for which it fails to strike the plate.

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`60^(@)`
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