Electronic Principles Current and voltage are said to be in phase when: their waveforms are both ac or both dc they have the same amplitude and frequency their waveforms cross through zero and reach positive and negative peaks at the same time All of these None of these their waveforms are both ac or both dc they have the same amplitude and frequency their waveforms cross through zero and reach positive and negative peaks at the same time All of these None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be: Twice the primary current No more than 10% less than the primary current Same as the primary current One-half the primary current None of these Twice the primary current No more than 10% less than the primary current Same as the primary current One-half the primary current None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the turns ratio of a power transformer that shows 50 V at its secondary winding when you apply 150 V to its primary winding? 43891 43922 None of these 3 2 43891 43922 None of these 3 2 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current? 7.75 µA 14.8 µA 10.3 µA 7.8 µA None of these 7.75 µA 14.8 µA 10.3 µA 7.8 µA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? None of these 6 9 85 81 None of these 6 9 85 81 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values? 0.93 W 0.041666666666667 9.3 W 0.93 V None of these 0.93 W 0.041666666666667 9.3 W 0.93 V None of these ANSWER DOWNLOAD EXAMIANS APP
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