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 7.8 mA 200 mA 208 mA None of these 300 mA 7.8 mA 200 mA 208 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns? 100 A None of these 0.41666666666667 0.1 A 1000 A 100 A None of these 0.41666666666667 0.1 A 1000 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question? 100 W 200 W 1000 W None of these 20 W 100 W 200 W 1000 W None of these 20 W ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements is true? None of these Power dissipation of a pure capacitor increases with operating frequency There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency Power dissipation of a pure capacitor decreases with operating frequency All of these None of these Power dissipation of a pure capacitor increases with operating frequency There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency Power dissipation of a pure capacitor decreases with operating frequency All of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? Current is induced in a conductor that is moving through a magnetic field None of these 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 Current is induced in a conductor that is moving through a magnetic field None of these 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 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How many types of flow are there in a semiconductor? 1 3 None of these 2 1 3 None of these 2 ANSWER DOWNLOAD EXAMIANS APP
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