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Zero and negativegoing. B. At its negative peak. C. Zero and positivegoing. D. At its positive peak. E. Any value; it doesn t matter. 27. The inductance of a coil can be continuously varied by: A. Varying the frequency. B. Varying the net core permeability. C. Varying the current in the coil. D. Varying the wavelength. E. Varying the voltage across the coil. 28. Power factor is defined as the ratio of: A. True power to VA power. B. True power to imaginary power. C. Imaginary power to VA power. D. Imaginary power to true power. E. VA power to true power. 29. A 50 feed line needs to be matched to an antenna with a purely resistive impedance of 200 . A quarterwave matching section should have: A. Zo 150 . B. Zo 250 . C. Zo 125 . D. Zo 133 . E. Zo 100 . QR Code Creation In .NET Framework Using Barcode encoder for ASP.NET Control to generate, create QRCode image in ASP.NET applications. QR Generation In .NET Framework Using Barcode generation for VS .NET Control to generate, create QRCode image in .NET applications. 352 Test: Part two 30. The vector 40 + j30 represents: A. 40 resistance and 30 H inductance. B. 40 uH inductance and 30 resistance. C. 40 resistance and 30 inductive reactance. D. 40 inductive reactance and 30 resistance. E. 40 uH inductive reactance and 30 resistance. 31. In a series RC circuit, where, R 300 and XC 30 : A. The current leads the voltage by a few degrees. B. The current leads the voltage by almost 90 degrees. C. The voltage leads the current by a few degrees. D. The voltage leads the current by almost 90 degrees. E. The voltage leads the current by 90 degrees. 32. In a stepdown transformer: A. The primary voltage is greater than the secondary voltage. B. The primary impedance is less than the secondary impedance. C. The secondary voltage is greater than the primary voltage. D. The output frequency is higher than the input frequency. E. 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