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 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 the core is permitted to move freely within the coil 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 changing the polarity of the current in the coil changes the polarity of the magnetic field around the core the core is permitted to move freely within the coil ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A low-pass filter: passes higher-frequency signals and reduces lower-frequency signals None of these has no effect on ac signals reduces the level of all frequencies by a significant amount passes lower-frequency signals and reduces higher-frequency signals passes higher-frequency signals and reduces lower-frequency signals None of these has no effect on ac signals reduces the level of all frequencies by a significant amount passes lower-frequency signals and reduces higher-frequency signals ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Most AC power is obtained from: generators batteries None of these lightning oscillators generators batteries None of these lightning oscillators ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is a negative ion? An atom that contains more electrons than neutrons An atom that contains more protons than electrons An atom that contains more electrons than protons None of these An atom that contains more protons than neutrons An atom that contains more electrons than neutrons An atom that contains more protons than electrons An atom that contains more electrons than protons None of these An atom that contains more protons than neutrons ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91? 1000 W 20 W None of these 100 W 200 W 1000 W 20 W None of these 100 W 200 W ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The total inductance of a series inductor circuit is: less than the value of the smallest inductor None of these equal to the source voltage divided by total current equal to the sum of the individual inductive-reactance values equal to the sum of the individual inductance values less than the value of the smallest inductor None of these equal to the source voltage divided by total current equal to the sum of the individual inductive-reactance values equal to the sum of the individual inductance values ANSWER DOWNLOAD EXAMIANS APP
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