Using Maxwell's equations, show that (a) A time-dependent magnetic field cannot exist without an electric field; (b)
Question:
(a) A time-dependent magnetic field cannot exist without an electric field;
(b) A uniform electric field cannot exist in the presence of a time-dependent magnetic field;
(c) Inside an empty cavity a uniform electric (or magnetic) field can be time-dependent.
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A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. The video shows the practical implications of magnetic force around different objects.
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