A long conducting circular rod is inside a long conducting square enclosure. The

Question

A long conducting circular rod is inside a long conducting square enclosure. The rod is maintained at a potential of -5000 V with respect to the square which is grounded (V=0). The countor lines are equipotential lines with V= -4000, -3000, -2000, and -1000 volts.

e to the square which s grounded V-O The con our lines are eau potentia with V -43000-2000 and 100 volts. 4 8 Part A Select a response for each statement below. (Use 'N', North, towards top of page (ty dir), and 'E', East, to the right (+x dir), 'NE' for in between 'N' and 'E', etc.) FalseThe y-component of the E-field at 7 is zero False The magnitude of the E-field at 4 is greater than that at 3 aEast The direction of the force on a small () charge at 1 is The direction of the force on a small (+)charge at 1 is FalseThe magnitude of the E-field at 6 is very small (~ zero). NWThe direction of the E-field at 3 is.. TrueThe x-component of the E-field at 4 is negative. Submit AnswerIncorrect. Tries 2/15 PreviousTries Part B Calculate the work which would be required to move a charge Q -74.7 nC from 7' to '5

Explanation / Answer

A) i) The y-component of the E-field at 7 is zero. (True)

ii) The magnitude of the E-field at 4 is greater than that at 3 (False)

iii) The direction of the force on a small (-) charge at 1 is South

iv) The direction of the force on a small (+) charge at 1 is North

     v) As point 6 is far the influence will be less and therfore the value of E is small and can be appx. zero (True)

   vi) The direction of E at 3 is South West

   vii) In the first case, as the E is moving inward, the x-component of E at 4 is positive.Hence statement is False.

B) Work =(74.7 * 10^-9 C)(3000 V) = 2.241 * 10^-4 J

Hope it is correct!!!

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