Given the self impedance at the fault location and the split coefficient of a certain power source to the fault location, the transfer impedance from the power source to the fault location should be ( ). A: self impedance times the split coefficient B: self impedance dividedby the split coefficient C: uncertain

zero output impedance

Which of the following statements is true? A: Op-amps are high-gain dc amplifiers B: Op-amps have extremely high input impedance. C: Op-amps have extremely low output impedance. D: All of the above

Given this configuration determine the input impedance if VS

2.Whichoftheelectricalpropertieslistedwillalwaysbethesameforeachcomponentinaparallelcircuit A: Impedance B: Current C: Resistance D: Voltage

Two electronic devices are connected in series. When the load device wants to get the maximum ( ), the impedance of that is the same as the output impedance of the source (front-stage) device. A: Current B: Voltage C: Resistance D: Electric power

What is the output impedance of the mobile phone charger approximately? A: 0.1Ω B: 10Ω C: 5.0Ω D: 1000Ω

The function of the video distributor is one channel of video input and multiple channels of video output, with the functions of impedance matching and signal amplification. ( )

At a ( ) fault of the<br/>system, the non-fault phase voltage will increase with the<br/>zero-sequence impedance. A: three-phase fault B: double line-to-ground fault C: line-to-line fault D: single line-to-ground fault

How is a medium characterized by ultrasound imaging?() A: By its thickness B: By its acoustic impedance C: By its water content D: By its density