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 volts with respect to the square which is grounded (V=0). The contour lines are equipotentials with V = -4000, -3000, -2000, and -1000 volts.

Select a response for each statement below. (Use 'N', North, towards top of page (+y dir), and 'E', East, to the right (+x dir), 'NE' for in between 'N' and 'E', etc.)
The direction of the force on a small (+) charge at 4 is ....
The direction of the force on a small (-) charge at 5 is ....
The x-component of the E-field at 6 is negative.
The magnitude of the E-field at 7 is very small (~ zero).
The direction of the E-field at 9 is ....
The y-component of the E-field at 4 is zero.
The magnitude of the E-field at 9 is greater than that at 6

Explanation / Answer

W

N

False

True

NW

True

TRue

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