A charged rod of total length 5.8 m lies centered on the x axis as shown (the L indicated in the picture is half of that number, meaning that L = 2.9 m). The rod has a charge density which varies according to λ=ax2 where a=−20.2 μC/m3. a) What is the total charge on the rod? b) What is the x component of the electric field at a point on the x axis a distance of D=4.2 m from the end of the rod? Use a negative sign for a field pointing in the -x direction.

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Q: da R

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A:

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Q: -೩ ೩- 2Q a X

A:

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.