Electronic Principles Current and voltage are said to be in phase when: their waveforms are both ac or both dc None of these their waveforms cross through zero and reach positive and negative peaks at the same time All of these they have the same amplitude and frequency their waveforms are both ac or both dc None of these their waveforms cross through zero and reach positive and negative peaks at the same time All of these they have the same amplitude and frequency ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A diode is in series with 220W. If the voltage across the resister is 4V, what is the current through the diode? 55 A 18.2 mA 55.86 A None of these 16.3 mA 55 A 18.2 mA 55.86 A None of these 16.3 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? 0.6 A None of these 0.2 A 0.3 A 0.4 A 0.6 A None of these 0.2 A 0.3 A 0.4 A 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 I = P/E P = PR None of these R = E2/P P = E2/R I = P/E P = PR None of these R = E2/P ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The basic unit of measurement for resistance is the: volt None of these ampere watt ohm volt None of these ampere watt ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles How much current flows through a 60-W light bulb that is operating at 120 V? 0.083333333333333 7200 A None of these 180 A 0.5A 0.083333333333333 7200 A None of these 180 A 0.5A ANSWER DOWNLOAD EXAMIANS APP
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