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[主观题]

The initial voltage of self-excitation generator set up by .

A.residual magnetism

B.voltage regulator

C.electrical current for excitation

D.the other running generator

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更多“The initial voltage of self-excitation generator set up by .”相关的问题

第1题

Determine the inductor initial voltage （) [图]...

Determine the inductor initial voltage ()

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第2题

AC voltmeters are generally calibrated to read the _____.

A.instantaneous voltage

B.average voltage

C.RMS voltage

D.peak voltage

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第3题

接触电压限值（touch voltage limit）

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第4题

The voltage follower typically has a voltage gain value of _______.

A.1000

B.100

C.10

D.1

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第5题

When a BJT is in cutoff, the collector-to-emitter voltage is typically equal to _____

A、collector supply voltage

B、collector current times collector resistor

C、0.3 Volts

D、emitter voltage

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第6题

WhichstatementistrueaboutForeignExchangeStation（FXS）portsonarouter？（）

A.TheFXSinterfaceallowsananalogconnectiontobedirectedatthepublicswitchedtelephonenetwork（PSTN’s）centraloffice.

B.TheFXSinterfaceconnectsdirectlytoastandardtelephone，faxmachine，orsimilardeviceandsuppliesring，voltage，anddialtone.

C.TheFXSinterfaceconnectsdirectlytoanIPphoneandsuppliesring，voltage，anddialtone.

D.TheFXSinterfaceconnectsdirectlytoISDNvoicechannels.

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第7题

After the formation of the pn junction, there is a built-in voltage across the junction.

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第8题

The main features of a difference pair, such as the circuit shown here, are _______.

A、very high input impedance and very high voltage gain

B、very high input impedance and moderate voltage gain

C、moderate input impedance and very high voltage gain

D、moderate input impedance and moderate voltage gain

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第9题

When the input voltage to this circuit is 0.25 V, the output voltage is _______

A.10.0 V

B.5.0 V

C.3.0 V

D.1.5 V

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第10题

When a BJT is biased in the cutoff region the collector-to-emitter voltage is typically equal to ____（）

A．the emitter voltage

B．0.03V

C．the collector current times the collector resistor

D．the collector supply voltage

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