A short, charged, thin, plastic rod of length 2a is placed on the y-axis. The total charge on the rod is +Q Coulombs. We want to determine the total electric field at a general point, P located on the r-axis. Notice the symmetry of the source, charged object about the z-axis. +a - a Y P I 1. Is this a one or two dimensional, source-charge integration? 2. What will be the coordinate that serves as the integration variable? 3. What should we expect the y-component of the total electric field at point P to be? 4. What is the position vector for the field point, P 5. What is the position vector for a differential element of the source charge distribution? This differential element of charge is labeled dq. al 87%

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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.