Two charge +q and -q are situated at a certain distance. At the point exactly midway between them
Correct answer: D. Electric field is not zero but potential is zero
- A. Electric field and potential both are zero
- B. Electric field is not zero but potential is not zero
- C. Electric field is zero but potential is not zero
- D. Electric field is not zero but potential is zero
Explanation
At the midpoint between two equal and opposite charges, the electric potential is zero because potential is a scalar quantity and the contributions from the two charges cancel out. However, the electric field is non-zero because it is a vector quantity. The fields from each charge add up as vectors in opposite directions, resulting in a non-zero field. Thus, the correct answer is that the electric field is not zero but the potential is zero.
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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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