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? None of these 300 mA 208 mA 7.8 mA 200 mA None of these 300 mA 208 mA 7.8 mA 200 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Thevenin theorem replaces a complicated circuit facing a load by an Ideal current source and parallel resistor Ideal voltage source and parallel resistor None of these Ideal current source and series resistor Ideal voltage source and series resistor Ideal current source and parallel resistor Ideal voltage source and parallel resistor None of these Ideal current source and series resistor Ideal voltage source and series resistor ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a purely inductive circuit: cuts the current through the inductors one-half doubles the amount of current through the inductors None of these increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit has no effect on the current through the inductors cuts the current through the inductors one-half doubles the amount of current through the inductors None of these increases the current, but by an amount that can be determined only by doing a complete analysis of the circuit has no effect on the current through the inductors ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question? 20 W 1000 W None of these 100 W 200 W 20 W 1000 W None of these 100 W 200 W ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? Thermal energy Doping Valence electrons None of these Free electrons Thermal energy Doping Valence electrons None of these Free electrons ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff? None of these 50 Ohm 100 Ohm or more 10 Ohm 60 Ohm None of these 50 Ohm 100 Ohm or more 10 Ohm 60 Ohm ANSWER DOWNLOAD EXAMIANS APP
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