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If the electric potential is given, the following cannot be directly calculated solely from this information:
– The electric field vector direction at a point without knowing the spatial variation of the potential.
– The specific charge distribution that generated the potential without additional information.
– The total electric charge without information on the surrounding geometry and permittivity of the medium.
– Kinetic energy of a charged particle in the potential field unless its initial conditions or total energy is known.
For most calculations involving electric potential, additional context or information is needed to precisely determine specific properties like the ones mentioned.
Answer: a
Explanation: Using potential, we can calculate electric field directly by gradient
operation. From E, the flux density D can also be calculated. Thus it is not possible to
calculate energy directly from potential.