Electronic Principles Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage? The voltage causes current to flow in two directions at the same time The voltage remains at one polarity and at a steady level The voltage reverses polarity periodically None of these The voltage remains at one polarity but changes value periodically The voltage causes current to flow in two directions at the same time The voltage remains at one polarity and at a steady level The voltage reverses polarity periodically None of these The voltage remains at one polarity but changes value periodically ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A device that converts chemical energy to electrical energy is called a: thermocouple electric device solar cell chemical cell None of these thermocouple electric device solar cell chemical cell None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A loadstone is: a natural magnet None of these a paramagnetic alloy a temporary magnet an artificial magnet a natural magnet None of these a paramagnetic alloy a temporary magnet an artificial magnet ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the number of turns of wire in an inductor: reduces the value of inductance by one-fourth None of these multiplies the value of inductance by two multiplies the value of inductance by four reduces the value of inductance by one-half reduces the value of inductance by one-fourth None of these multiplies the value of inductance by two multiplies the value of inductance by four reduces the value of inductance by one-half ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the inductive reactance of a 2-H coil operating at 60 Hz? 120 Ohm 60 Ohm 30 Ohm 754 Ohm None of these 120 Ohm 60 Ohm 30 Ohm 754 Ohm None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Waveforms are graphs that show: amplitude on the vertical axis and frequency on the horizontal axis the passage of time on the vertical axis and amplitude on the horizontal axis None of these amplitude on the vertical axis and the passage of time on the horizontal axis frequency on the vertical axis and amplitude on the horizontal axis amplitude on the vertical axis and frequency on the horizontal axis the passage of time on the vertical axis and amplitude on the horizontal axis None of these amplitude on the vertical axis and the passage of time on the horizontal axis frequency on the vertical axis and amplitude on the horizontal axis ANSWER DOWNLOAD EXAMIANS APP
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