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1) Two parallel infinite lines with equal and opposite but uniform charge distributions of 100 nC/m are separated by a distance of 1 mm. Determine the force per unit length.

2) An infinite, uniformly charged line with a charge density of 100 nC/m extends along the z axis.Find the force experienced by a charge of 500 nC located at (3,4,0)

3) An electron is circling around the nucleus of a hydrogen atom at a radius of 0.05 nm. Determine the angular velocity an the time period of the electron

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