Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? 9 6 85 81 None of these 9 6 85 81 None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the inductive reactance of a 0.1-H coil that is operating at 1000 Hz? 628 Ohm 444 Ohm Less than 1 Ohm None of these 100 Ohm 628 Ohm 444 Ohm Less than 1 Ohm None of these 100 Ohm ANSWER DOWNLOAD EXAMIANS APP
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? 200 mA 208 mA 7.8 mA None of these 300 mA 200 mA 208 mA 7.8 mA None of these 300 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles If the base supply voltage increases, the Q point moves down nowhere off the load line up None of these down nowhere off the load line up None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit? None of these Flux density Number of lines of force Reluctance Magnetomotive force None of these Flux density Number of lines of force Reluctance Magnetomotive force ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? Doping Free electrons None of these Valence electrons Thermal energy Doping Free electrons None of these Valence electrons Thermal energy ANSWER DOWNLOAD EXAMIANS APP
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