Electronic Principles A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage? None of these 208 V 700 V 651 V 707 V None of these 208 V 700 V 651 V 707 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? Free electrons Thermal energy Doping None of these Valence electrons Free electrons Thermal energy Doping None of these Valence electrons ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current? 68.4 mA 28.4 mA 34.4 mA 24.2 mA None of these 68.4 mA 28.4 mA 34.4 mA 24.2 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? 4 None of these 0.5 0.25 180 4 None of these 0.5 0.25 180 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the difference between a conductor and an insulator? The difference between conductors and insulators depends on how they are used An insulator allows current to flow much easier than a conductor does None of these A conductor allows current to flow much easier than an insulator does An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all The difference between conductors and insulators depends on how they are used An insulator allows current to flow much easier than a conductor does None of these A conductor allows current to flow much easier than an insulator does An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A real voltage source has Zero internal resistance None of these Infinite internal resistance A large internal resistance A small internal resistance Zero internal resistance None of these Infinite internal resistance A large internal resistance A small internal resistance ANSWER DOWNLOAD EXAMIANS APP
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