1. Concept: This setup describes a classic electric dipole. Electric potential is a scalar quantity, meaning the potentials from multiple charges simply add algebraically (keeping their positive or negative signs).
2. Formula: $$ V_{net} = V_+ + V_- $$
3. Solution: - The total distance is \( 2d \), meaning the midpoint M is exactly distance \( d \) away from both charges.
- Potential from positive charge: \( V_+ = \frac{k(+5\mu\text{C})}{d} \).
- Potential from negative charge: \( V_- = \frac{k(-5\mu\text{C})}{d} \).
- Summing them: \( V_{net} = \frac{k(5\mu\text{C})}{d} - \frac{k(5\mu\text{C})}{d} = 0 \).
4. Why other options are incorrect: Options A, B, and C would apply if the question asked for Electric Field intensity (a vector, where the two fields would point in the exact same direction and constructively add together). Potential, being scalar, strictly cancels.
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