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 300 mA 208 mA 200 mA 7.8 mA None of these 300 mA 208 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit? Magnetomotive force None of these Reluctance Flux density Number of lines of force Magnetomotive force None of these Reluctance Flux density Number of lines of force ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The number of free electrons and holes in intrinsic semiconductor increases when the temperature Increases 0oC None of these Decreases Stays the same Increases 0oC None of these Decreases Stays the same ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The saturation point is approximately the same as cutoff point upper end of the load line lower end of the load line None of these infinity cutoff point upper end of the load line lower end of the load line None of these infinity 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? 0.25 µA 250 µA None of these 300 µA 350 µA 0.25 µA 250 µA None of these 300 µA 350 µA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In an intrinsic semiconductor, the number of free electrons None of these Is less than the number of holes Impossible to say Is greater than the number of holes Equals the number of holes None of these Is less than the number of holes Impossible to say Is greater than the number of holes Equals the number of holes ANSWER DOWNLOAD EXAMIANS APP
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