P4-5 Two sources having a luminous intensity of 400 candelas are hung at a height of 10 m. The distance between the two lamp posts is 20 m. Find the illumination a) Beneath the lamp and b) in the middle of the posts. 10 m0₁ 10 m-10 m-l 20 m- 10 m B

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Z parameter

The Z-parameters that are the impedance parameters of a two-port network are defined by expressing the two-port voltages V1 and V2 in terms of two-port currents I1 and I2. The Z-parameters are calculated by open circuiting one of the two ports at a time henceforth they are called open-circuit impedance parameters.