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A particle of mass m carries an electric...

A particle of mass `m` carries an electric positive charge `Q` and is subjected to the combined action of gravity `g` and a uniform horizontal electric field of strength `E`,it is projected with speed `u` to the vertical plane parallel to the electrical field and at an angle `theta `to the horizontal .The maximum distance the particle travels horizontally when it is at the same level as its starting point is

Text Solution

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`R_("max")= ( v^(2))/(mg^(2)) ( qE + sqrt(m^(2)g^(2) + q^(2) E^(2)))`
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