Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? Current flowing through a conductor generates a magnetic field None of these Like magnetic poles repel, while unlike poles attract Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field Current flowing through a conductor generates a magnetic field None of these Like magnetic poles repel, while unlike poles attract Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A real voltage source has None of these Zero internal resistance A large internal resistance Infinite internal resistance A small internal resistance None of these Zero internal resistance A large internal resistance Infinite internal resistance A small internal resistance ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What kind of device is a diode? Linear None of these Bilateral Unipolar Nonlinear Linear None of these Bilateral Unipolar Nonlinear ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current? P = IE P = E2/R I = P/E P = I2R None of these P = IE P = E2/R I = P/E P = I2R None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? None of these 9 81 85 6 None of these 9 81 85 6 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage? 24 V None of these 12 V 30 V 18 V 24 V None of these 12 V 30 V 18 V ANSWER DOWNLOAD EXAMIANS APP
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