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? 300 mA None of these 208 mA 200 mA 7.8 mA 300 mA None of these 208 mA 200 mA 7.8 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a step-down transformer, which is larger? Neither None of these Impossible to say Secondary voltage Primary voltage Neither None of these Impossible to say Secondary voltage Primary voltage ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? Like magnetic poles attract, while unlike poles repel Like magnetic poles repel, while unlike poles attract Current flowing through a conductor generates a magnetic field None of these Current is induced in a conductor that is moving through a magnetic field Like magnetic poles attract, while unlike poles repel Like magnetic poles repel, while unlike poles attract Current flowing through a conductor generates a magnetic field None of these Current is induced in a conductor that is moving through a magnetic field ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles When a series RLC circuit is operating at its resonant frequency: None of these inductive reactance is greater than the capacitive reactance capacitive reactance is greater than the inductive reactance the difference between inductive and capacitive reactance is equal to the resistance inductive reactance is equal to the capacitive reactance None of these inductive reactance is greater than the capacitive reactance capacitive reactance is greater than the inductive reactance the difference between inductive and capacitive reactance is equal to the resistance inductive reactance is equal to the capacitive reactance ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The equivalent of 1 kV is: 1000 V 1.00 V None of these 1000 mV 100 mV 1000 V 1.00 V None of these 1000 mV 100 mV ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is one important thing transistors do? Amplify weak signals Regulate voltage None of these Emit light Rectify line voltage Amplify weak signals Regulate voltage None of these Emit light Rectify line voltage ANSWER DOWNLOAD EXAMIANS APP
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