Electronic Principles Which one of the following devices is most often used for measuring opposition to current flow in a circuit? Ohmmeter Voltmeter Ammeter Wattmeter None of these Ohmmeter Voltmeter Ammeter Wattmeter None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? 81 None of these 85 6 9 81 None of these 85 6 9 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles When applying a square waveform to a capacitor, the circuit tends to: peak the current and round off the voltage waveforms peak both the voltage and current waveforms round off both the voltage and current waveforms None of these peak the voltage and round off the current waveforms peak the current and round off the voltage waveforms peak both the voltage and current waveforms round off both the voltage and current waveforms None of these peak the voltage and round off the current waveforms ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: None of these 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 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 the core is permitted to move freely within the coil an increase in current through the coil causes no further increase in the mmf frequent changes in the direction of current through the coil causes heating effects in the core material ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a pure inductor: ac current is converted to dc voltage ac current leads the voltage by 90 degree ac current and voltage are exactly in phase None of these ac current lags the voltage by 90 degree ac current is converted to dc voltage ac current leads the voltage by 90 degree ac current and voltage are exactly in phase None of these ac current lags the voltage by 90 degree ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The equivalent of 1 micro A is: one-millionth of an ampere 10000A None of these 1000 A one million amperes one-millionth of an ampere 10000A None of these 1000 A one million amperes ANSWER DOWNLOAD EXAMIANS APP
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