Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? None of these 0.5 4 0.25 180 None of these 0.5 4 0.25 180 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? 12 V 30 V None of these 18 V 24 V 12 V 30 V None of these 18 V 24 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles For a pure capacitor: ac current lags the voltage by 90 degree ac current and voltage are exactly in phase None of these ac current leads the voltage by 90 degree ac current is converted to dc voltage ac current lags the voltage by 90 degree ac current and voltage are exactly in phase None of these ac current leads the voltage by 90 degree ac current is converted to dc voltage ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? 6 81 None of these 9 85 6 81 None of these 9 85 ANSWER DOWNLOAD EXAMIANS APP
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 Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field Like magnetic poles repel, while unlike poles attract None of these Current flowing through a conductor generates a magnetic field Like magnetic poles attract, while unlike poles repel Current is induced in a conductor that is moving through a magnetic field Like magnetic poles repel, while unlike poles attract None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the turns ratio for the transformer specified in the above question? 1.5 10.738 0.707 None of these 0.575 1.5 10.738 0.707 None of these 0.575 ANSWER DOWNLOAD EXAMIANS APP
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