Physics · Electric potential and its calculation for a point charge, electric dipole and system of charges
If a charge is moved against the coulomb force of an electric field, then :
If a charge is moved against the coulomb force of an electric field, then :
- A. work is done by the electric field
- B. energy is used from some outside source
- C. the strength of the field is decreased
- D. the energy of the system is decreased
Step-by-step solution
Moving a charge against the Coulomb force requires external work to overcome the electric field, thereby using energy from an outside source. The field does negative work, and the system's potential energy increases, not decreases. Field strength remains unaffected unless the source charges change.
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