An α particle is a positively charge particle which is the nucleus of a helium atom 42he. An engineer who studied physics 158 e&m is designing a detector using a long metal wire and a uniform plastic plate. The details are as follows -- the long line carrying a uniform linear charge density +50. 0 μc/m runs parallel to and 10. 0cm from the surface of a large, flat plastic plate that has a uniform surface charge density of −100μc/m2 on one side

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