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An electric field E → = 25 i ^ + 30 j ^ N C - 1 exists in a region of space. If the potential at the origin is taken to be zero then the potential at x = 2 m , y = 2 m is:

Options

  1. A- 110   J   C - 1
  2. B- 140   J   C - 1
  3. C- 130   J   C - 1
  4. D- 120   J   C - 1

Correct answer

A. - 110   J   C - 1

Step-by-step solution

∵ ∆ V = - E → . ∆ r → V - 0 = - 25 i ^ + 30 j ^ .   2 i ^ + 2 j ^ = - 50 + 60 V = - 110   v o l t = - 110   J   C - 1

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