Electronic Principles A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current? 7.8 mA 300 mA None of these 208 mA 200 mA 7.8 mA 300 mA None of these 208 mA 200 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How much power is being dissipated by a 1000 W resistance that has 25 V applied to it? 0.24 W 80 W 0.625 W 325 kW None of these 0.24 W 80 W 0.625 W 325 kW None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The nucleus of the copper atom contains how many protons? None of these 4 29 18 1 None of these 4 29 18 1 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The number of free electrons and holes in intrinsic semiconductor increases when the temperature Increases Decreases None of these Stays the same 0oC Increases Decreases None of these Stays the same 0oC ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the total resistance of a parallel circuit that contains two resistors having values of 220 ohm and 470 ohm? 220 ohm None of these 445 ohm 150 ohm 690 ohm 220 ohm None of these 445 ohm 150 ohm 690 ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit? Reluctance There is no valid comparison Retentivity Permeance Permeability Reluctance There is no valid comparison Retentivity Permeance Permeability ANSWER DOWNLOAD EXAMIANS APP
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