Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? 85 81 None of these 6 9 85 81 None of these 6 9 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements is true for the voltage in a parallel RC circuit? The voltage always has the same amplitude and phase for every part of the circuit None of these The total voltage is equal to the sum of the voltages across the resistance and capacitance The total voltage leads the total current by less than 90 degree The total voltage is less than the sum of the voltages across the resistance and capacitance The voltage always has the same amplitude and phase for every part of the circuit None of these The total voltage is equal to the sum of the voltages across the resistance and capacitance The total voltage leads the total current by less than 90 degree The total voltage is less than the sum of the voltages across the resistance and capacitance ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Current and voltage are said to be in phase when: they have the same amplitude and frequency All of these their waveforms cross through zero and reach positive and negative peaks at the same time None of these their waveforms are both ac or both dc they have the same amplitude and frequency All of these their waveforms cross through zero and reach positive and negative peaks at the same time None of these their waveforms are both ac or both dc ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The core of an electromagnet is said to be in saturation when: the core is permitted to move freely within the coil None of these 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 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 None of these 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 frequent changes in the direction of current through the coil causes heating effects in the core material ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The equivalent of 1 megohms is: one million ohms 1 k ohm None of these 100,000 ohm one-millionth of an ohm one million ohms 1 k ohm None of these 100,000 ohm one-millionth of an ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Current can flow through a normally open push button switch as long as: its contact remain open you are pressing the button its contact remain open None of these you are not pressing the button its contact remain open you are pressing the button its contact remain open None of these you are not pressing the button ANSWER DOWNLOAD EXAMIANS APP
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