The electric potential at a point in an electric field can be defined as?
Correct answer: B. Work done in bringing a unit positive charge from infinity to that point while keeping the charge in equilibrium
- A. Work done in bringing a unit positive charge from infinity to that point
- B. Work done in bringing a unit positive charge from infinity to that point while keeping the charge in equilibrium
- C. Work done in bringing a unit negative charge from infinity to that point while keeping the charge in equilibrium
- D. Work done in bringing a unit negative charge from infinity to that point
Explanation
Electric potential at a point is defined as the amount of work done in moving a unit positive charge from infinity to that point. Following this, the potential difference between two points is defined as the amount of "work done in moving a unit positive charge from one point to the other against the field".
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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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