When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is _____.A.laggingB.leadingC.maximumD.minimum
When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is _____.
A.lagging
B.leading
C.maximum
D.minimum
相关考题:
Which of the following characteristics must be matched depending on the specifications of thepower grid for the country a PSU will be utilized in?() A. WattageB. AmperageC. ResistanceD. Voltage
WhichstatementsistrueaboutForeignExchangeStation(FXS)portsonarouter?() A.theFXSinterfaceallowsananalogconnectiontobedirectedatthepublicswitchedtelephonenetwork(PSTN’s)centralofficeB.theFXSinterfaceconnectdirectlytoastandardtelephone,faxmachine,orsililardeviceandsuppliesring,voltage,anddialtoneC.theFXSinterfaceconnectdirectlytoanIPphoneandsuppliesring,voltage,anddialtoneD.theFXSinterfaceconnectdirectlytoISDNvoicechannels
WhichstatementistrueaboutForeignExchangeStation(FXS)portsonarouter?() A.TheFXSinterfaceallowsananalogconnectiontobedirectedatthepublicswitchedtelephonenetwork(PSTN’s)centraloffice.B.TheFXSinterfaceconnectsdirectlytoastandardtelephone,faxmachine,orsimilardeviceandsuppliesring,voltage,anddialtone.C.TheFXSinterfaceconnectsdirectlytoanIPphoneandsuppliesring,voltage,anddialtone.D.TheFXSinterfaceconnectsdirectlytoISDNvoicechannels.
The political situation in the region has deteriorated rapidly.A: improvedB: changedC: worsenedD:developed
Many forms of cancer can be cured if detected early.A:discoveredB:selectedC:operatedD:developed
One-room schoolhouse can still be found in isolated areas of North America.A:bareB:deprivedC:remoteD:developed
3、若IRR函数中参数values全部设置为正值,则函数将返回()。A.0B.#N/AC.#NUM!D.#VALUE!