Two points charges, +5µC and -5µC are placed at points A and B, respectively, which are separated by a distance 2d. What is the electric potential at the midpoint M of the line joining A and B?
Answer: zero
Explanation
The electric potential at a point due to a point charge
The formula gives Q:𝑉=𝑘/𝑄𝑟
Where:
V is the electric potential,
k is Coulomb's constant,
Q is the charge, and
r is the distance from the charge to the point where the potential is being calculated.
In this case, there are two charges: +5μC at point A and −5μC at point B.
The electric potential is a scalar quantity, meaning it can simply be added algebraically.
