Part 2 question

PreLecture Exploration Electric Potential and Electric Fields The simulation allows the physis student to change the magnitude and man of two cleargus sie passed at ( s on 0) the offveer at (5 cm. 0) A set of axes demarcates the sus and the sovulation deans a set of electric field homes In addition, the simulation caleslaton the alactres Bold magnitude and electro potential al the location of a test charge chosen by the student to be anywhere within a space of 20 on by 20 em y (cm) Test charge 15x (om) Left charge: Right charge 2.5 HC 2.5 UC Test charge 0.783989090989 MV 8.1 N/UC Reset Click here to open the simulation in a new window Part 1 of 5 . Understanding where the potential can be zero near an electric dipole and the role symmetry plays Choose the value of the left charge to be +2.4 JC and that of the right charge to be -2 4 JC. Now place the test charge at various locations within the field of view and note the magnitude of the electric field, JE|, and the value of the electric potential. V. Is there a point on the diagram where V is zero? Yes, the point at the origin is the only point where the test charge can be placed such that V - 0. No, there are no points in the field of view where V will be zero, since the common choice for zero potential is infinitely far away from the charges. .Yes, in fact, there is a set of points where the potential will be zero. These points are all equidistant from the two charges and therefore form a plane perpendicular to the xy plane shown in the simulation so that the plane intersects the two-dimensional view above in a line. This line is along the y-axis Yes, any point on the perimeter of the field of view will give a very small potential which we can estimate as being very close to zero. Correct. Be sure to verify this result by placing the test charge on the y axis and viewing the value of the electric potential that the simulation predicts. Part 2 of 5 - Examining the relationship of the electric field to the potential, specifically where the potential is zero Verify this result by placing the test charge on the y-axis and viewing the value of the electric potential that the simulation predicts Does this mean that the electric field is also zero at these points, since the electric potential can be calculated from the electric field? O No. However, this is true only because of the choice of a zero of the potential at the origin in this simulation. Notice that the potential is not zero infinitely far from the charges as is the usual choice for the zero of potential. O Although V is zero at all points on the y-axis, the magnitude of the electric field is not zero at these points. The potential V can be zero while the field strength [EI is non-zero because the field depends on the change in potential, rather than the value of potential itself. Yes. However, this is true only because of the choice of a zero of the potential at the origin in this simulation. Notice that the potential is not zero Infinitely far from the charges as is the usual choice for the zero of potential. Yes, at every point where the potential is zero the electric field must also be zero