disk with radius R has uniform surface charge density σ. Part A By regarding the disk as a series of thin concentric rings, calculate the electric potential V  at a point on the disk's axis a distance x  from the center of the disk. Assume that the potential is zero at infinity.  Part B Calculate −∂V/∂x

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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.