When charges q_a,q_b,and q_c are placed respectively at the corners a,b,and c of a right triangle,the potential at the midpoint of the hypotenuse is 20 V.When the charge q_a is removed,the potential at the midpoint becomes 15 V.When,instead,the charge q_b is removed (q_a and q_c both in place),the potential at the midpoint becomes 12 V.What is the potential at the midpoint if only the charge q_c is removed from the array of charges? A)8.0 V B)5.0 V C)7.0 V D)13 V

Question

Quizplus · Accepted Answer

The potential at the midpoint with all charges is 20 V. Removing q_a drops it to 15 V, indicating q_a contributes 5 V. Removing q_b drops it to 12 V, indicating q_b contributes 8 V. Thus, q_c must contribute 7 V (20 V - 5 V - 8 V). Removing q_c, the potential is 20 V - 7 V = 13 V.

When Charges Qa,qb,and Qc Are Placed Respectively at the Corners

When Charges Q_a,q_b,and Q_c Are Placed Respectively at the Corners