Question

Rod in Square Tube r rod is inside a long conducting square enclosure. eined at a pot ential of -5000 volts with respect ct to the square which is grounded (-0). The contour lines are equipotentials with V =-4000,-3000,-2000, and-1000 volts. square w Part A 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.) NW The direction of the force on a small (+) charge at 9 is The magnitude of the E-field at 2 is very small (zero) N The Y-component of the E-field at 6 is positive. TrueThe y-component of the E-field at 9 is zero. N The direction of the force on a small () charge at 7 is.... True The magnitude of the E-field at 6 is greater than that at 3 I sw The direction of the E-feld at 4 is Submit Answ Part B Calculate the work which would be required to move a charge Q 72.3 nC from '4' to '5' Submit Answer Tries O/6

Answer 1

The direction of the force on a small + charge at 9 is west

It is not true that the electric field at 2 is very small (it depends on the size of the square enclosure.)

The y-component of the electric field at 6 is negative not positive

The y-component of the electric field at 9 is zero. It is true as the normal to the equipotential line is directed along the x direction

The direction of the force on a negative charge at 7 is towards north. It is correct.

The magnitude of electric field at 6 is greater than 3 is not correct. In fact the equipotential lines are dense near 3, therefore electric field at 3 is larger.

The direction of the electric field at 4 is NE (north east).

(B) Work done is  

$W = q\Delta V$ = 144.6 micro Jules.