Two point charges, each of magnitude q, are separated by a distance 2d. At a point mid-way between:
Correct answer: C. E=0,V≠0
- A. E=0,V=0
- B. E≠0,V=0
- C. E=0,V≠0
- D. E≠0,V≠0
Explanation
E=0,V≠0 Correct. The electric field at the midpoint cancels out because the two charges create fields in opposite directions. However, the potential is the sum of contributions from both charges, which is nonzero.
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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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