Question

In: Physics

Consider four 60·nC charges placed at the corners of a square, which is 3.6·m on a...

Consider four 60·nC charges placed at the corners of a square, which is 3.6·m on a side. The charges on the bottom are both positive, and the charges on the top are both negative.

(a) Find the electric field at the center of the square, in units of V/m. vector E = 0 i hat + 235.7 j

(b)Find the electric field at the midpoint of the right side, in units of V/m. vector E = _ i hat + _ j

Please help find the answer to part B.

Solutions

Expert Solution

We know that the electric field is directed away from a positive charge and  electric field is directed towards the  negative charge.

At point  'P' the electric field due to the charges Q1, Q2, Q3 and Q4 are

We resolve in x- y direction

&

The net electric field at point P is

  

    [ 'k' is Coulomb's Constant]

From geometry, we find and given a(side length)=3.6m

Let

So we find the x component of the net electric field is

[ ]

And the y- component of the net electric field is

  

So the  electric field at the midpoint of the right side is

  

  

genius_generous answered 2 years ago
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