482. If the electric potential is given, which of the following cannot be calculated? a) Electrostatic energy b) Electric field intensity c) Electric flux density d) Permittivity
482. If the electric potential is given, which of the following cannot be calculated? a) Electrostatic energy b) Electric field intensity c) Electric flux density d) Permittivity
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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.