Concentric Eletric Field Question

CH1991 · Sep 15, 2011

Hi! I have already write everything on the pictures(In attachment), I have already circled the correct answer, however, I am not sure explain it correctly. So, can you check my explanation or question?
Thanks!

Screenshot of three exam questions (13 to 15) on electric fields from concentric cylinders, with a diagram of nested cylinders and five candidate E versus r graphs (A to E), annotated with handwritten explanations and selected answers.

Spinnor · Sep 15, 2011

Draw an imaginary surface that contains both the thick conductor and the line of charge. What is the net charge per length inside that surface?

Concentric Eletric Field Question

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