![]() mechanical collisions between two objects,. ![]() The mathematics of the theorem also applies to other physical interactions, such as: The theorem can be extended to alternating current circuits that include reactance, and states that maximum power transfer occurs when the load impedance is equal to the complex conjugate of the source impedance. In fact, the source resistance that maximizes power transfer from a voltage source is always zero (the hypothetical ideal voltage source), regardless of the value of the load resistance. #Max power transee ez how toIt does not say how to choose the source resistance for a given load resistance. ![]() It is a common misconception to apply the theorem in the opposite scenario. The theorem states how to choose (so as to maximize power transfer) the load resistance, once the source resistance is given. Although the total power dissipated increases (due to a lower total resistance), the amount dissipated in the load decreases. If the load resistance is made smaller than the source resistance, then efficiency decreases (since most of the power ends up being dissipated in the source). If the load resistance is made larger than the source resistance, then efficiency increases (since a higher percentage of the source power is transferred to the load), but the magnitude of the load power decreases (since the total circuit resistance increases). The theorem results in maximum power transfer from the power source to the load, and not maximum efficiency of useful power out of total power consumed. ![]() Moritz von Jacobi published the maximum power (transfer) theorem around 1840 it is also referred to as " Jacobi's law". In electrical engineering, the maximum power transfer theorem states that, to obtain maximum external power from a power source with internal resistance, the resistance of the load must equal the resistance of the source as viewed from its output terminals. ![]()
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