Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage? 170 V 120 V 100 V 180 V None of these TRUE ANSWER : ? YOUR ANSWER : ?
The total inductive reactance of a parallel inductor circuit is: less than the inductance value of the smallest inductor equal to the source voltage divided by total current equal to the sum of the individual inductive-reactance values None of these equal to the sum of the individual inductance values TRUE ANSWER : ? YOUR ANSWER : ?
A low-pass filter: passes higher-frequency signals and reduces lower-frequency signals has no effect on ac signals None of these reduces the level of all frequencies by a significant amount passes lower-frequency signals and reduces higher-frequency signals TRUE ANSWER : ? YOUR ANSWER : ?
To get the Thevenin voltage, you have to Short the voltage source None of these Open the voltage source Short the load resistor Open the load resister TRUE ANSWER : ? YOUR ANSWER : ?
A high-pass filter: 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 TRUE ANSWER : ? YOUR ANSWER : ?
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? 208 mA 7.8 mA None of these 300 mA 200 mA TRUE ANSWER : ? YOUR ANSWER : ?
If a load resistance is 1 kW, a stiff current source has a resistance of At least 10 Ohm None of these More than 100 k Ohm Less than 100 k Ohm Less than 10 Ohm TRUE ANSWER : ? YOUR ANSWER : ?
1 Microfarad is the same as: 1 million farads 1 million picofarads None of these 1 millionth of a picofarad 1000 millifarads TRUE ANSWER : ? YOUR ANSWER : ?
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? 600 V 0.4 V 4.73 None of these 24 V TRUE ANSWER : ? YOUR ANSWER : ?
A real voltage source has None of these A small internal resistance Zero internal resistance Infinite internal resistance A large internal resistance TRUE ANSWER : ? YOUR ANSWER : ?