Question
Asked Feb 10, 2020
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Two charges are separated as shown in the figure. At which location or locations is the electric potential equal to zero? Keep in mind that the more + or - signs indicates more charge.


 A
 B and C
 A and C
 A and B

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Expert Answer

Step 1

Let distance between each gap be represented by a and the charges are as shown

Physics homework question answer, step 1, image 1

Step 2

The electric potential at any point by a single charge is given as

Physics homework question answer, step 2, image 1

where Q is the charge on the body and r is its distance from that point. The potential die to multiple bodies is simply given as the sum of potential due to each one of them at the given point.

Now,

Physics homework question answer, step 2, image 2

...

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