学术英语理工第二版王健燕答案.pdfVIP

操千曲尔后晓声，观千剑尔后识器。——刘勰

学术英语理工第二版王健燕答案

1.Itisconventionaltotakethecurrentflowasthemovementof.（）[单选题]

A.negativecharges

B.positivecharges(正确答案)

C.anycharge

D.protons

2.Electriccurrentisthetimerateofcharge,measuredin.（）[单选题]

A.watts

B.volts

C.joules

D.amperes(正确答案)

3.Theenergyrequiredtomoveaunitchargethroughanelementis.（）[单选题]

A.current

B.power

C.voltage(正确答案)

D.potential

4.Theplus(+)andminus(-)signsinanelectriccircuitdiagramareusedtodefine.（）

[单选题]

A.voltagepolarity(正确答案)

操千曲尔后晓声，观千剑尔后识器。——刘勰

B.currentdirection

C.powerflow

D.absorbedpower

5.Accordingtothepassivesignconvention,ifthepowerhasaplussign,poweris()

bytheelement.()[单选题]

A.supplied

Babsorbed(正确答案)

C.generated

D.transferred

6.Anindependentvoltagesourceisa(),whichmaintainsaspecifiedvoltage

betweenitsterminals.（）[单选题]

A.one-terminalelement

B.two-terminalelement(正确答案)

C.three-terminalelement

D.four-terminalelement

7.Resistorsare()elements.（）[单选题]

A.passive(正确答案)

B.active

C.independentsource

D.dependentsource

8.Anidealdependentsourceisan()elementinwhichthesourcequantityis

controlledbyanothervoltageorcurrent.（）[单选题]

操千曲尔后晓声，观千剑尔后识器。——刘勰

A.passive

B.active(正确答案)

C.independent

D.inductive

9.Thereare(