Electronic Principles Which one of the following statements most accurately reflects the nature of ac power? The current in an ac circuit changes direction periodically None of these The current in an ac circuit flows in one direction, but changes value periodically The current in an ac circuit flows in two directions at the same time The current in an ac circuit flows in one direction at a steady level The current in an ac circuit changes direction periodically None of these The current in an ac circuit flows in one direction, but changes value periodically The current in an ac circuit flows in two directions at the same time The current in an ac circuit flows in one direction at a steady level ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a current source has an Ideal current of 10 mA and an internal resistance of 20 MW. For what values of load resistance will the current source appear stiff? 200 k Ohm or more 20 km or less 200 k Ohm or less None of these 20 k Ohm or more 200 k Ohm or more 20 km or less 200 k Ohm or less None of these 20 k Ohm or more ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The total capacitance of a series capacitor circuit is: less than the value of the smallest capacitor None of these equal to the source voltage divided by total current equal to the sun of the individual capacitive-reactance values equal to the sum of the individual capacitance values less than the value of the smallest capacitor None of these equal to the source voltage divided by total current equal to the sun of the individual capacitive-reactance values equal to the sum of the individual capacitance values ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A high-pass filter: passes higher-frequency signals and reduces lower-frequency signals has no effect on ac signals passes lower-frequency signals and reduces higher-frequency signals increases the level of all frequencies by a significant amount None of these passes higher-frequency signals and reduces lower-frequency signals has no effect on ac signals passes lower-frequency signals and reduces higher-frequency signals increases the level of all frequencies by a significant amount None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation? 20 mW 200 mW None of these 300 mW 10 mW 20 mW 200 mW None of these 300 mW 10 mW 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: None of these One-half the primary current Twice the primary current Same as the primary current No more than 10% less than the primary current None of these One-half the primary current Twice the primary current Same as the primary current No more than 10% less than the primary current ANSWER DOWNLOAD EXAMIANS APP
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