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? 300 mA 208 mA None of these 200 mA 7.8 mA 300 mA 208 mA None of these 200 mA 7.8 mA 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 = I2R I = ER I = E/R None of these E = PR E = I2R I = ER I = E/R None of these E = PR ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the inductive reactance of a 2-H coil operating at 60 Hz? 120 Ohm 60 Ohm None of these 30 Ohm 754 Ohm 120 Ohm 60 Ohm None of these 30 Ohm 754 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Holes are the minority carriers in which type of semiconductor? n-type p-type Extrinsic None of these Intrinsic n-type p-type Extrinsic None of these Intrinsic ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements is true? Power dissipation of a pure capacitor decreases with operating frequency None of these There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency All of these Power dissipation of a pure capacitor increases with operating frequency Power dissipation of a pure capacitor decreases with operating frequency None of these There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency All of these Power dissipation of a pure capacitor increases with operating frequency ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a pure inductor: None of these ac current is converted to dc voltage ac current and voltage are exactly in phase ac current lags the voltage by 90 degree ac current leads the voltage by 90 degree None of these ac current is converted to dc voltage ac current and voltage are exactly in phase ac current lags the voltage by 90 degree ac current leads the voltage by 90 degree ANSWER DOWNLOAD EXAMIANS APP
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