Electronic Principles An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current? 68.4 mA 34.4 mA 24.2 mA None of these 28.4 mA 68.4 mA 34.4 mA 24.2 mA None of these 28.4 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage? 3 V 7.5 V 8 V None of these 16 V 3 V 7.5 V 8 V None of these 16 V 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? 400 Ohm 310 Ohm 550 Ohm 410 Ohm None of these 400 Ohm 310 Ohm 550 Ohm 410 Ohm None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current? 3.75 mA 3.2 mA 13 mA 0.05 mA None of these 3.75 mA 3.2 mA 13 mA 0.05 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In an intrinsic semiconductor, the number of free electrons Impossible to say Is greater than the number of holes Equals the number of holes Is less than the number of holes None of these Impossible to say Is greater than the number of holes Equals the number of holes Is less than the number of holes None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The total impedance of a series RLC circuit: always decreases as the applied frequency increases None of these is maximum at the resonant frequency is minimum at the resonant frequency always increases as the applied frequency increases always decreases as the applied frequency increases None of these is maximum at the resonant frequency is minimum at the resonant frequency always increases as the applied frequency increases ANSWER DOWNLOAD EXAMIANS APP
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