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? None of these 200 mA 7.8 mA 300 mA 208 mA None of these 200 mA 7.8 mA 300 mA 208 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An ideal voltage source has Infinite internal resistance A load dependent voltage None of these A load-dependent current Zero internal resistance Infinite internal resistance A load dependent voltage None of these A load-dependent current Zero internal resistance ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Thevenin theorem replaces a complicated circuit facing a load by an Ideal current source and parallel resistor Ideal voltage source and series resistor Ideal current source and series resistor Ideal voltage source and parallel resistor None of these Ideal current source and parallel resistor Ideal voltage source and series resistor Ideal current source and series resistor Ideal voltage source and parallel resistor None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have? 310 Ohm 400 Ohm 550 Ohm 410 Ohm None of these 310 Ohm 400 Ohm 550 Ohm 410 Ohm None of these 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? 300 µA None of these 350 µA 250 µA 0.25 µA 300 µA None of these 350 µA 250 µA 0.25 µA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is a free electron? An electron that has no electrical charge None of these An electron that has twice the amount of charge of a normal electron An electron that costs nothing An electron that has been freed from its parent atom An electron that has no electrical charge None of these An electron that has twice the amount of charge of a normal electron An electron that costs nothing An electron that has been freed from its parent atom ANSWER DOWNLOAD EXAMIANS APP
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