In a current-carrying conductor varying electric field generates
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Solution
Current-carrying conductor:
A varying electric field is a field that changes with respect to time.
According to Maxwell's electromagnetic theory, a changing electric field can generate a time-varying magnetic field.
From Maxwell's equation, , Where and are the time varying electric and magnetic fields, J is the electric current density, and are the magnetic permeability and electric permittivity respectively.
In the case of electromagnetic waves, varying magnetic field generate a time-varying electric field and vice versa. That's why electromagnetic waves can travel without any medium.
Therefore, varying electric field can generates a varying magnetic field.