Electronic Principles A device that converts mechanical pressure to electrical energy is called a: photodiode solar cell piezoelectric device None of these nicad cell photodiode solar cell piezoelectric device None of these nicad cell 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 the core is permitted to move freely within the coil 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 frequent changes in the direction of current through the coil causes heating effects in the core material the core is permitted to move freely within the coil 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 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles When the collector current increases, what does the current gain do? any of the above increases decreases stays the same None of these any of the above increases decreases stays the same None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements most accurately applies to the frequency of a waveform? The higher the amplitude of a waveform, the higher its frequency The actual frequency of a sine waveform is 1.41 times the working frequency None of these Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz The longer the period of a waveform, the lower its frequency The higher the amplitude of a waveform, the higher its frequency The actual frequency of a sine waveform is 1.41 times the working frequency None of these Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz The longer the period of a waveform, the lower its frequency ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff? 20 k Ohm 1 k Ohm 10 k Ohm None of these 2 k Ohm 20 k Ohm 1 k Ohm 10 k Ohm None of these 2 k Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrasers best describes flux density? The force that maintains lines of force The rate of change of the number of lines of magnetic force The concentration of lines of magnetic force None of these The opposition to a build-up of magnetic fields The force that maintains lines of force The rate of change of the number of lines of magnetic force The concentration of lines of magnetic force None of these The opposition to a build-up of magnetic fields ANSWER DOWNLOAD EXAMIANS APP
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