Two equal and opposite charges of 10 C are separated at a distance of 10 cm, the electric potential at mid-point between the charges is:
Correct answer: D. 0 V
- A. 20 V
- B. 10 V
- C. 5 V
- D. 0 V
Explanation
At the midpoint between two equal and opposite charges, the electric potential contributions from each charge are equal in magnitude but opposite in sign. Therefore, they cancel each other out, resulting in a total electric potential of 0 V at that point. This is why the correct answer is 0 V. The other options suggest a non-zero potential, which does not consider the crucial fact that the charges are equal and opposite, leading to a complete cancellation of their effects at the midpoint.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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