R1 d Figure P23.9 A disk of radius R has a uniform surface charge density o. Calculate the electric field at a point P that lies along the central perpendicular axis of the disk and a distance x from the center of the disk (Fig. 23.4). Figure 23.4 (Example 23.3) A uniformly charged disk of dq radius R. The electric field at an axial point Pis directed along the central axis, perpendicular to the plane of the disk. R dr

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Q: R2

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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.