A Positive Charge Surrounded By A Gaussian Sphere
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<figure class="product"> <iframe seamless width="210" height="210" allowTransparency="true" src="http://vizit.github.io/catalog/positiveChargeWithGaussianSphere/index.html"> </iframe> <figcaption>The field lines radiate out from the charge and pass through the sphere.</figcaption> </figure>