Electronic Principles Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff? 100 Ohm 5 Ohm None of these 50 Ohm or more 6 Ohm 100 Ohm 5 Ohm None of these 50 Ohm or more 6 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the inductive reactance of a 2-H coil operating at 60 Hz? 120 Ohm 754 Ohm None of these 60 Ohm 30 Ohm 120 Ohm 754 Ohm None of these 60 Ohm 30 Ohm 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 period of a waveform is: the time required to complete one full cycle the number of cycles completed in one second None of these equal to 0.707 times the peak amplitude the time required for the voltage to rise from 10% to 90% of the peak amplitude the time required to complete one full cycle the number of cycles completed in one second None of these equal to 0.707 times the peak amplitude the time required for the voltage to rise from 10% to 90% of the peak amplitude ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? 0.5 None of these 4 0.25 180 0.5 None of these 4 0.25 180 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating frequency of a purely capacitive circuit: doubles the amount of total current thrice the amount of total current has no effect on the total circuit current cuts the total current by one-half None of these doubles the amount of total current thrice the amount of total current has no effect on the total circuit current cuts the total current by one-half None of these ANSWER DOWNLOAD EXAMIANS APP
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