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Q. For a pyramidal-horn antenna, the maximum directive gain is given by
occurring when the aperture dimensions are A ∼ = √3λLandB = 0.81A. The principal-plane beam- widths for the optimum horn with maximum gain are given by θB ∼ = 54λ/B in degrees in the yz- plane, and by φB ∼ = 78λ/A in degrees in the xz- plane. For a pyramidal horn, with A = 6λ and B = 4.86λ, at 6 GHz, ?nd GD, θB, and φB. Comment on whether this horn is optimum.
Explain properties and application of Aluminium. Properties of Aluminium: 1) Pure aluminium in colour is silver white. 2) Aluminium is a ductile metal and can be put
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explain all the components involved in transmission of electricity
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A Class, "A" Amplifier is needed with the following specification: Collector Current = 5mA Needed offset voltage across RE= 2V Lowest input Frequency = 50Hz Use a BC108
Q. Three loads in parallel are supplied by a single phase 400-V, 60-Hz supply: Load A: 10 kVA at 0.8 leading power factor Load B: 15 kW at 0.6 lagging power factor Load C:
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Determine phase - voltage and power: A balanced star connected load is supplied from a symmetrical 3-phase 440 Volt system. The current in each of the phase is 40 Amp and lags
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