Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? 4 0.5 None of these 0.25 180 4 0.5 None of these 0.25 180 ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following phrases most accurately describes a purely inductive circuit? Resistances provide the only opposition to current flow Combinations of resistance and inductive reactance provide any opposition to current flow None of these The ac voltage lags the current by 90 degree Inductive reactance provides the only opposition to current flow Resistances provide the only opposition to current flow Combinations of resistance and inductive reactance provide any opposition to current flow None of these The ac voltage lags the current by 90 degree Inductive reactance provides the only opposition to current flow 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: 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 None of these One-half the primary current Twice the primary current Same as the primary current ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles When a series RLC circuit is operating at its resonant frequency: inductive reactance is equal to the capacitive reactance capacitive reactance is greater than the inductive reactance the difference between inductive and capacitive reactance is equal to the resistance inductive reactance is greater than the capacitive reactance None of these inductive reactance is equal to the capacitive reactance capacitive reactance is greater than the inductive reactance the difference between inductive and capacitive reactance is equal to the resistance inductive reactance is greater than the capacitive reactance None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles At room temperature an intrinsic silicon crystal acts approximately like None of these a piece of copper wire a conductor an insulator a battery None of these a piece of copper wire a conductor an insulator a battery ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements most accurately describes the nature of inductive reactance? Inductive reactance is a force that tends to overcome the effects of counter emf Inductive reactance is an opposition to current flow in dc circuits None of these Inductive reactance is an opposition to current flow in ac circuits Inductive reactance is another term for counter emf Inductive reactance is a force that tends to overcome the effects of counter emf Inductive reactance is an opposition to current flow in dc circuits None of these Inductive reactance is an opposition to current flow in ac circuits Inductive reactance is another term for counter emf ANSWER DOWNLOAD EXAMIANS APP
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