A length of copper wire carries a current of 11 A, uniformly distributed through its cross section. Calculate the energy density of (a) the magnetic field and (b) the electric field at the surface of the wire. The wire diameter is 2.1 mm, and its resistance per unit length is 3.8 Ω/km. (a) Number i Units (b) Number i Units
A length of copper wire carries a current of 11 A, uniformly distributed through its cross section. Calculate the energy density of (a) the magnetic field and (b) the electric field at the surface of the wire. The wire diameter is 2.1 mm, and its resistance per unit length is 3.8 Ω/km. (a) Number i Units (b) Number i Units
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Transcribed Image Text:A length of copper wire carries a current of 11 A, uniformly distributed through its cross section. Calculate the energy density of (a)
the magnetic field and (b) the electric field at the surface of the wire. The wire diameter is 2.1 mm, and its resistance per unit length
is 3.8 Ω/km.
(a) Number
Units
(b) Number
Units
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