1.

A very long straight uniformly charged thread carries a charge lambda per unit length, Find the magnitude and direction of the electric field strenght at a point which is at a distance y from the thread and lies on the perpendicular passing through one of the thread.s ends.

Answer»

`(lambdasqrt(3))/(4piepsilon_(0)y),theta=40^(0)`
`(lambdasqrt(5))/(4piepsilon_(0)y),theta=40^(0)`
`(lambdasqrt(5))/(4piepsilon_(0)y),theta=40^(0)`
`(lambdasqrt(2))/(4piepsilon_(0)y),theta=45^(0)`

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