Electronic Principles Which one of the following statements most accurately reflects the nature of ac power? The current in an ac circuit flows in two directions at the same time The current in an ac circuit flows in one direction, but changes value periodically The current in an ac circuit changes direction periodically None of these The current in an ac circuit flows in one direction at a steady level The current in an ac circuit flows in two directions at the same time The current in an ac circuit flows in one direction, but changes value periodically The current in an ac circuit changes direction periodically None of these The current in an ac circuit flows in one direction at a steady level ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The emitter diode is usually Nonconducting Operating in the breakdwon region None of these Reverse-biased Forward-biased Nonconducting Operating in the breakdwon region None of these Reverse-biased Forward-biased ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles An audio transformer has a turn ratio of 9, What is its impedance ratio? None of these 6 85 9 81 None of these 6 85 9 81 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage? 707 V None of these 208 V 700 V 651 V 707 V None of these 208 V 700 V 651 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrases most accurately describes a purely capacitive circuit? Combinations of resistance and capacitive reactance provide any opposition to current flow The ac voltage leads the current by 90 degree None of these Capacitive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow Combinations of resistance and capacitive reactance provide any opposition to current flow The ac voltage leads the current by 90 degree None of these Capacitive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff? 6 Ohm None of these 5 Ohm 50 Ohm or more 100 Ohm 6 Ohm None of these 5 Ohm 50 Ohm or more 100 Ohm ANSWER DOWNLOAD EXAMIANS APP
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