Electric potential at a point is
Correct answer: B. the work done per unit positive charge in bringing it from infinity to that point
- A. a vector measured in newtons per coulomb
- B. the work done per unit positive charge in bringing it from infinity to that point
- C. the force per unit charge
- D. the charge stored per unit voltage
Explanation
Potential is a scalar measured in volts, so potentials from several charges are added arithmetically with their signs rather than as vectors, which makes it far easier to handle than field intensity. Force per unit charge is the field, and charge per unit voltage is capacitance. Only differences in potential have physical meaning, which is why infinity is chosen as the zero.
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About Electric Potential
Electric potential is the work done per unit positive charge in bringing it from infinity to a point, while potential difference compares energy change between two points. Work includes potential due to point charges, superposition of scalar potentials, equipotential surfaces, and the relation between electric field and potential.
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