Electric field lines are equipotential lines B) perpendicular toC) the same as A

Question

Electric field lines are equipotential lines B) perpendicular toC) the same as A) tangent to D) parallel to U16Q2 A charge of 2 is moved 3 cm along an equipotential surface that has a value of 456V. How much work was required to move this charge along the surface? A)0 J B) 0.27 D) 27 J U16Q3 The same charge is then moved a distance of 2 cm to another equipotential line that has a value of 3.21 V. How much work was required to move this charge? A) 0 J B) 0.27uJ C) 2.7 D) 27 J U16P? The diagram below is a set of equipotential lines and surfaces. Complete the diagram by drawing in electric field lines and indicate where the field lines would be strongest and weakest. The surfaces are solid objects. Determine the field strength between given the points 4.4V 6.7V Points A and B d-0.4 cnm 8.3V 10.4V A. 12V ov Points E and F d-1.3 cm Points D and C d-4.4 cm

Explanation / Answer

(1) correct option is (b)

Equipotentiallines are perpendicular to surface .

(2) Q = 2 uC, d = 3 cm

Here the potential change is zero hence the change in potential energy is zero hence no work done is required because the change in kinetic energy is also zero

(3)

Thepotential difference = V_2-V_1 = 3.21-4.56 = -1.35 V

Hence the change in potential energy = - 2*10^-6*1.35 = -2.70 uJ

So the required work done will be negative of the change in potential energy which is 2.7 uJ because again the kinetic energy is not being changed.

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