Electronic Principles The current gain of a transistor is defined as the ratio of the collector current to the emitter current base current None of these collector current supply current emitter current base current None of these collector current supply current 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 Which one of the following phrasers best describes flux density? The opposition to a build-up of magnetic fields None of these The rate of change of the number of lines of magnetic force The force that maintains lines of force The concentration of lines of magnetic force The opposition to a build-up of magnetic fields None of these The rate of change of the number of lines of magnetic force The force that maintains lines of force The concentration of lines of magnetic force ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How may valence electrons does a silicon atom have? 4 2 1 None of these 4 2 1 None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles For a pure capacitor: ac current leads the voltage by 90 degree None of these ac current and voltage are exactly in phase ac current is converted to dc voltage ac current lags the voltage by 90 degree ac current leads the voltage by 90 degree None of these ac current and voltage are exactly in phase ac current is converted to dc voltage ac current lags the voltage by 90 degree ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transistor has how many doped regions? None of these 3 4 2 1 None of these 3 4 2 1 ANSWER DOWNLOAD EXAMIANS APP
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