Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? 85 6 None of these 81 9 85 6 None of these 81 9 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The period of a waveform is: equal to 0.707 times the peak amplitude the time required to complete one full cycle the time required for the voltage to rise from 10% to 90% of the peak amplitude the number of cycles completed in one second None of these equal to 0.707 times the peak amplitude the time required to complete one full cycle the time required for the voltage to rise from 10% to 90% of the peak amplitude the number of cycles completed in one second None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles To get the Thevenin voltage, you have to Open the load resister Short the load resistor Short the voltage source None of these Open the voltage source Open the load resister Short the load resistor Short the voltage source None of these Open the voltage source ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: frequent changes in the direction of current through the coil causes heating effects in the core material None of these changing the polarity of the current in the coil changes the polarity of the magnetic field around the core an increase in current through the coil causes no further increase in the mmf the core is permitted to move freely within the coil frequent changes in the direction of current through the coil causes heating effects in the core material None of these changing the polarity of the current in the coil changes the polarity of the magnetic field around the core an increase in current through the coil causes no further increase in the mmf the core is permitted to move freely within the coil ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding? None of these 0.20833333333333 20 A 50 A None of these 0.20833333333333 20 A 50 A ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The transistor has a current gain of 175. If the base current is 0.1 mA, what is the collector current? 1.75 mA None of these 1750 mA 17.5 mA 175 mA 1.75 mA None of these 1750 mA 17.5 mA 175 mA ANSWER DOWNLOAD EXAMIANS APP
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