dua kawat lurus sejajar masing masing berarus i1 3a

by

Diketahui :

begin mathsize 14px style i subscript 1 equals 3 space A i subscript 2 equals 12 space A d equals 30 space cm a subscript 1 double bond x space cm a subscript 2 equals left parenthesis 30 minus sign x right parenthesis space cm end style

 

Pembahasan :

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell B subscript P end cell equals 0 row cell B subscript 1 plus left parenthesis minus sign B subscript 2 right parenthesis end cell equals 0 row cell B subscript 1 end cell equals cell B subscript 2 end cell row cell fraction numerator mu subscript 0 i subscript 1 over denominator 2 πa subscript 1 end fraction end cell equals cell fraction numerator mu subscript 0 i subscript 2 over denominator 2 πa subscript 2 end fraction end cell row cell i subscript 1 over a subscript 1 end cell equals cell i subscript 2 over a subscript 2 end cell row cell 3 over x end cell equals cell fraction numerator 12 over denominator 30 minus sign x end fraction end cell row cell 15 x end cell equals 90 row x equals cell 6 space cm end cell end table end style

Kaprikornus, jawaban yg sempurna yakni A

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