the sketch below shows cross sections of equipotential surfaces between two char

Question

the sketch below shows cross sections of equipotential surfaces between two charged conductors that are shown in solid grey. various points on the equipotential surfaces near the conductors are labeled A,B,C, ..I. what is the magnitude of the electric field at point A nt/mainfr.uni 05Cutnell, Physics, 8th edition US Cutnell, Physics, ath edition & Practice GENERAL PHYSICS L II (PHYS 201, 202) Test Bank, Question 37 Incorrect. The sketch below shows cross cections of equipotential surfaces between twe charged cenductors that are shown in solid grey. Vanious paints on the equipotential surfaces near the conductors aw lsbeled A B, C I I1 -70 -20 +20 V *40 What is the magnitude of the electric field at point A? 25 vim O100 V/ 10 V/m e here to search

Explanation / Answer

We can clearly see that at the right end of the image, the equipotenital surfaces become straight vertical lines

So, Electric field lines needs to be horizontal and parallel and directed towards left (towards decreasing electric potential) and the parallel electric field lines tell us the electric field is constant at this point.

Now, magnitude of electric field, E = dV/dx = change in potential / distance

Now, from the image potential changes from +40V to 0 V by moving 0.4 m from right to left

So, E = (40 - 0)/0.4 = 100 V/m <--------answer

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