Physics, 11.10.2020 23:01, irishdreamer0689

A thin plastic rod of length 2.5 m is rubbed all over with wool, and acquires a charge of 75 nC, distributed uniformly over its surface. Calculate the magnitude of the electric field due to the rod at a location 7 cm from the midpoint of the rod. Do the calculation two ways, first using the exact formula for a rod of any length, and second using the approximate formula for a long rod.

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A thin plastic rod of length 2.5 m is rubbed all over with wool, and acquires a charge of 75 nC, dis...