Discussion
The steps of using Gauss's law to find a field are listed below. Put them in order.
1. Evaluate the enclosed charge 2. Identify the symmetry of the charge distribution 3. Solve for the field 4. Choose a surface on which the field is constant
Answer: A
The symmetry has to be recognised first because it dictates the surface; the enclosed charge can only be computed once the surface is fixed; and the field follows last. Attempting the steps in any other order leads to an integral that cannot be done.
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