Electronic Principles A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current? 208 mA 300 mA 200 mA 7.8 mA None of these 208 mA 300 mA 200 mA 7.8 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it? E = PR I = ER E = I2R None of these I = E/R E = PR I = ER E = I2R None of these I = E/R ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles For a pure capacitor: ac current leads the voltage by 90 degree ac current is converted to dc voltage None of these ac current and voltage are exactly in phase ac current lags the voltage by 90 degree ac current leads the voltage by 90 degree ac current is converted to dc voltage None of these ac current and voltage are exactly in phase ac current lags the voltage by 90 degree ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode None of these 14 mA 11 mA 12 mA 10 mA None of these 14 mA 11 mA 12 mA 10 mA 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 3.75 mA 3.2 mA None of these 0.05 mA 13 mA 3.75 mA 3.2 mA None of these 0.05 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The nucleus of the copper atom contains how many protons? 18 29 None of these 1 4 18 29 None of these 1 4 ANSWER DOWNLOAD EXAMIANS APP
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