Electronic Principles Which one of the following phrases most accurately describes a purely capacitive circuit? None of these Capacitive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow Combinations of resistance and capacitive reactance provide any opposition to current flow The ac voltage leads the current by 90 degree None of these Capacitive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow Combinations of resistance and capacitive reactance provide any opposition to current flow The ac voltage leads the current by 90 degree ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? None of these Doping Free electrons Thermal energy Valence electrons None of these Doping Free electrons Thermal energy Valence electrons ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How may valence electrons does a silicon atom have? 2 4 1 None of these 2 4 1 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? 180 4 None of these 0.25 0.5 180 4 None of these 0.25 0.5 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it? None of these E = PR I = ER E = I2R I = E/R None of these E = PR I = ER E = I2R I = E/R ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding? 600 V 24 V 0.4 V None of these 4.73 600 V 24 V 0.4 V None of these 4.73 ANSWER DOWNLOAD EXAMIANS APP
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