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? None of these 550 Ohm 410 Ohm 310 Ohm 400 Ohm None of these 550 Ohm 410 Ohm 310 Ohm 400 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A high-pass filter: has no effect on ac signals increases the level of all frequencies by a significant amount passes lower-frequency signals and reduces higher-frequency signals None of these passes higher-frequency signals and reduces lower-frequency signals has no effect on ac signals increases the level of all frequencies by a significant amount passes lower-frequency signals and reduces higher-frequency signals None of these passes higher-frequency signals and reduces lower-frequency signals ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? 180 0.25 4 None of these 0.5 180 0.25 4 None of these 0.5 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The merging of a free electron and a hole is called Thermal energy Recombination Covalent bonding None of these Lifetime Thermal energy Recombination Covalent bonding None of these Lifetime ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current? 10.3 µA None of these 7.75 µA 14.8 µA 7.8 µA 10.3 µA None of these 7.75 µA 14.8 µA 7.8 µA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the algebraic sum of this series of values:+2, -3, -6,+4? -3 None of these 2 -6 -3 None of these 2 -6 ANSWER DOWNLOAD EXAMIANS APP
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