ammeters have negligible internal resistances Fill in the blanks in a d or

Ammeters have negligible internal resistances fill in

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ammeters have negligible internalresistances.Fillin theblanks(ina-d)orcirclethecorrect answer(ine).You may use thebackof anysheetforscratchworkbutthese willnot begraded. (Each partis 6points,nonc Qpartialcredit,nocreditforpropagatingerrors;payattentionto thedirectionof thecurrents, polarityof thebatteriesand thedirectionof theloopsaswellas to thesignsinyour equations. Particularly, doublecheckyour answertoparts(a)whichiseasy,but if you get itwrong, your answerstoother questionsmay bewrong too.)H-&-\o (a) If weapplyKirchoffsjunction ruletojunctionC we find:f\1=X/Amps. (b)Theabsolute valueof the emf of theunknown battery betweenC and D isCO£<fi=16/volts.Leo?
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NAME: 4.Apairofidentical copper wiresoflengthL=0.16m arewelded together alongonequarteroftheirlengthsasshownin thefigure.Thecrosssectionalareaofeach wireis8.5xlO~10m2.Theresistivityofcopperisp-1.7x10~8Q.m.The twofreeendsareconnectedto the (+) and the (-)terminalsof asmall battery whichhas an emf of 1.2volts.Theinternal resistanceof thebatteryisnegligible.a)Findthetotal resistanceof thewelded wires.(12points)
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