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By Collin, Robert E.; Zucker, Francis J

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If the current is time varying, then the derivative of the current of (1-1c) can be written as dvz dIz = ql = ql az dt dt (1-2) where dvz ∕dt = az (meters/sec2 ) is the acceleration. If the wire is of length l, then (1-2) can be written as l dvz dIz = lql = lql az dt dt (1-3) Equation (1-3) is the basic relation between current and charge, and it also serves as the fundamental relation of electromagnetic radiation [4], [5]. It simply states that to create radiation, there must be a time-varying current or an acceleration (or deceleration) of charge.

Vol. 42, No. 6, pp. 872–878, June 1994. 63. E. W. Lucas and T. P. Fontana, “A 3-D Hybrid Finite Element/Boundary Element Method for the Unified Radiation and Scattering Analysis of General Infinite Periodic Arrays,” IEEE Trans. , Vol. 43, No. 2, pp. 145–153, February 1995. 64. IEEE Trans. , Special Issue on Metamaterials, Vol. 51, No. 10, October 2003. 65. IEEE Trans. , Special Issue on Artificial Magnetic Conductors, Soft/ Hard Surfaces and Other Complex Surfaces, Vol. 53, No. 1, Jan. 2005. 66.

83566 ΔΘ1 =ΔΘ2 ???? b. 23% in error.

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