Electronic Principles The period of a waveform is: the number of cycles completed in one second the time required for the voltage to rise from 10% to 90% of the peak amplitude equal to 0.707 times the peak amplitude the time required to complete one full cycle None of these the number of cycles completed in one second the time required for the voltage to rise from 10% to 90% of the peak amplitude equal to 0.707 times the peak amplitude the time required to complete one full cycle None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the capacitive reactance of a 0.1 micro F capacitor that is operating at 1000 Hz? None of these 312 Ohm 1590 Ohm 690 Ohm less than 1 Ohm None of these 312 Ohm 1590 Ohm 690 Ohm less than 1 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current? 13 mA 3.2 mA 3.75 mA None of these 0.05 mA 13 mA 3.2 mA 3.75 mA None of these 0.05 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A low-pass filter: None of these reduces the level of all frequencies by a significant amount passes higher-frequency signals and reduces lower-frequency signals passes lower-frequency signals and reduces higher-frequency signals has no effect on ac signals None of these reduces the level of all frequencies by a significant amount passes higher-frequency signals and reduces lower-frequency signals passes lower-frequency signals and reduces higher-frequency signals has no effect on ac signals ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Current and voltage are said to be in phase when: their waveforms cross through zero and reach positive and negative peaks at the same time they have the same amplitude and frequency None of these All of these their waveforms are both ac or both dc their waveforms cross through zero and reach positive and negative peaks at the same time they have the same amplitude and frequency None of these All of these their waveforms are both ac or both dc ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating? P = E2/R R = E2/P I = P/E None of these P = PR P = E2/R R = E2/P I = P/E None of these P = PR ANSWER DOWNLOAD EXAMIANS APP
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