Four positive charges 10-9 coulombs each are located on the x – y plane at points (0, 0), (0, 1), (1, 1) and (1, 0) m. The electric field and potential at (0.5, 0.5) m are respectively:

Four positive charges 10-9 coulombs each are located on the x – y pl

1.	Four positive charges 10-9 coulombs each are located on the x – y plane at points (0, 0), (0, 1), (1, 1) and (1, 0) m. The electric field and potential at (0.5, 0.5) m are respectively:
A.	0 and 51 V
B.	0 and 12.5 V
C.	0 and 18 V
D.	0 and 25.5 V
Answer» B. 0 and 12.5 V

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Four positive charges 10-9 coulombs each are located on the x – y plane at points (0, 0), (0, 1), (1, 1) and (1, 0) m. The electric field and potential at (0.5, 0.5) m are respectively:

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