Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? 0.25 0.5 4 180 None of these 0.25 0.5 4 180 None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the diameter of the coil in an inductor: reduces the value of inductance by one-fourth multiplies the value of inductance by two reduces the value of inductance by one-half multiplies the value of inductance by four None of these reduces the value of inductance by one-fourth multiplies the value of inductance by two reduces the value of inductance by one-half multiplies the value of inductance by four None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The total impedance of a parallel RLC circuit: always decreases as the applied frequency increases None of these is equal to the sum of the values of resistance, inductive reactance and capacitive reactance is maximum at the resonant frequency always increases as the applied frequency increases always decreases as the applied frequency increases None of these is equal to the sum of the values of resistance, inductive reactance and capacitive reactance is maximum at the resonant frequency always increases as the applied frequency increases ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following statements most accurately describes the nature of inductive reactance? 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 a force that tends to overcome the effects of counter emf Inductive reactance is another term for 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 a force that tends to overcome the effects of counter emf Inductive reactance is another term for counter emf ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding? 24 V 4.73 0.4 V None of these 600 V 24 V 4.73 0.4 V None of these 600 V ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The current gain of a transistor is defined as the ratio of the collector current to the collector current emitter current base current supply current None of these collector current emitter current base current supply current None of these ANSWER DOWNLOAD EXAMIANS APP
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