Electronic Principles What is the smallest number of polarities required for current flow? None of these One - a negative terminal Three - negative, positive and neutral terminals Four - two negative and two positive Two - a negative terminal and a positive terminal None of these One - a negative terminal Three - negative, positive and neutral terminals Four - two negative and two positive Two - a negative terminal and a positive terminal ANSWER DOWNLOAD EXAMIANS APP
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? 24.2 mA 68.4 mA 34.4 mA 28.4 mA None of these 24.2 mA 68.4 mA 34.4 mA 28.4 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Inductive reactance is measured in units of: Ohm amperes per second None of these volts per second henrys Ohm amperes per second None of these volts per second henrys ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The Norton current is sometimes called the Thevenin voltage Thevenin current Shorted-load current None of these Open-load current Thevenin voltage Thevenin current Shorted-load current None of these Open-load current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A high-pass filter: passes lower-frequency signals and reduces higher-frequency signals None of these has no effect on ac signals increases the level of all frequencies by a significant amount passes higher-frequency signals and reduces lower-frequency signals passes lower-frequency signals and reduces higher-frequency signals None of these has no effect on ac signals increases the level of all frequencies by a significant amount passes higher-frequency signals and reduces lower-frequency signals ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: an increase in current through the coil causes no further increase in the mmf None of these 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 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 None of these 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 changing the polarity of the current in the coil changes the polarity of the magnetic field around the core ANSWER DOWNLOAD EXAMIANS APP
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