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? 200 mA 7.8 mA None of these 208 mA 300 mA 200 mA 7.8 mA None of these 208 mA 300 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Voltage is Trie force that causes electrons to flow None of these The number of free electrons in an atom The flow of charged particles through a material The smallest electrically charged particle Trie force that causes electrons to flow None of these The number of free electrons in an atom The flow of charged particles through a material The smallest electrically charged particle ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The knee voltage of a diode is approximately equal to the Barrier potential Breakdown voltage Applied voltage None of these Forward voltage Barrier potential Breakdown voltage Applied voltage None of these Forward voltage ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor? 350 µA 300 µA 0.25 µA None of these 250 µA 350 µA 300 µA 0.25 µA None of these 250 µA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode 12 mA 10 mA None of these 11 mA 14 mA 12 mA 10 mA None of these 11 mA 14 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit? Retentivity Reluctance There is no valid comparison Permeability Permeance Retentivity Reluctance There is no valid comparison Permeability Permeance ANSWER DOWNLOAD EXAMIANS APP
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