Electronic Principles Which one of the following principles best describes the basic operation of an electromagnet? Like magnetic poles attract, while unlike poles repel Current flowing through a conductor generates a magnetic field Current is induced in a conductor that is moving through a magnetic field None of these Like magnetic poles repel, while unlike poles attract Like magnetic poles attract, while unlike poles repel Current flowing through a conductor generates a magnetic field Current is induced in a conductor that is moving through a magnetic field None of these Like magnetic poles repel, while unlike poles attract ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A low-pass filter: passes higher-frequency signals and reduces lower-frequency signals reduces the level of all frequencies by a significant amount passes lower-frequency signals and reduces higher-frequency signals has no effect on ac signals None of these passes higher-frequency signals and reduces lower-frequency signals reduces the level of all frequencies by a significant amount passes lower-frequency signals and reduces higher-frequency signals has no effect on ac signals None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A circuit has two different voltage sources that are connected in a series-aiding form. If the sources are rated at 6 V and 9 V, what is the total source voltage? 15 V 7.5 V None of these 16 V 8 V 15 V 7.5 V None of these 16 V 8 V 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 1750 mA None of these 17.5 mA 175 mA 1.75 mA 1750 mA None of these 17.5 mA 175 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rise time of a pulse waveform is the time required for the voltage to rise: from zero to its rms value from 10% of the peak value to 90% of the peak value from 10% of the peak value to 70.7% of the peak value from zero to its peak value None of these from zero to its rms value from 10% of the peak value to 90% of the peak value from 10% of the peak value to 70.7% of the peak value from zero to its peak value None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A device that converts mechanical pressure to electrical energy is called a: solar cell photodiode piezoelectric device nicad cell None of these solar cell photodiode piezoelectric device nicad cell None of these ANSWER DOWNLOAD EXAMIANS APP
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