6. Charge q1= -4.0 x 10\"5 C is separated by 8.00m from q; which has a charge of 2.5 x 1045 C. a. Determine the net electric eld strength at the position P. 4.0 cm to the right of qz. [3] Mom Q mm P b) A test charge of 2.1 x 10" is placed at point P. How much electrical potential energy does the test charge have? [3] 7. Charge or is placed in a uniform electric eld with strength a. Using the relationships for work and electric force, determine an expression for electric potential in the uniform electric field. [l-lint: it should include the variables V, and s). [3]