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Two identical point charges (12.4 × 10-9C) are fixed in place, separated by 0.50 m (see the figure). Concepts: (i) The electric field is a vector and has a direction. At the midpoint, what are the directions of the individual electric-field contributions from qA and qB? (ii) Is the magnitude of the net electric field at the midpoint greater than, less than, or equal to zero? (iii) Is the total electric potential at the midpoint positive, negative, or zero? (iv) Does the electric potential have a direction associated with it? Explain. Calculations: Find the electric field and the electric potential at the midpoint of the line between the charges qA and qB.
Problem 71 determines the electric field and the electric potential at the midpoint (rA = rB) between the identical charges (qA = qB). |
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