Pada gambar di bawah, jika kawat PQ sejajar kawat ...

Pada gambar di bawah, jika kawat PQ sejajar kawat RS dan diketahui $begin mathsize 14px style i subscript 1 equals 6 space straight A end style$ , jarak kedua kawat a = 20 cm, $begin mathsize 14px style mu subscript 0 equals 4 pi cross times 10 to the power of negative 7 end exponent end style$ wb/Am, menghasilkan gaya per satuan panjang sebesar $begin mathsize 14px style 4 comma 8 cross times 10 to the power of negative 5 end exponent end style$ N/m, maka besar kuat arus $begin mathsize 14px style i subscript 2 end style$ adalah .... $space$

8 A
6 A
2 A
10 A
4 A

Jawaban:

$i subscript 1 equals 6 space straight A a equals 0 comma 2 space straight m mu subscript o equals 4 straight pi cross times 10 to the power of negative 7 space end exponent Wb divided by Am F over l equals 4 comma 8 cross times 10 to the power of negative 5 end exponent space straight N divided by straight m Ditanya colon space i subscript 2 equals...$

$table attributes columnalign right center left columnspacing 0px end attributes row cell F over l end cell equals cell fraction numerator mu subscript o i subscript 1 i subscript 2 over denominator 2 πa end fraction end cell row cell 4 comma 8 cross times 10 to the power of negative 5 end exponent end cell equals cell fraction numerator open parentheses 4 straight pi cross times 10 to the power of negative 7 end exponent close parentheses open parentheses 6 close parentheses i subscript 2 over denominator 2 straight pi open parentheses 0 comma 2 close parentheses end fraction end cell row cell i subscript 2 end cell equals cell fraction numerator 4 comma 8 cross times 10 over denominator 6 end fraction end cell row blank equals cell 8 space straight A end cell end table$

Jadi, pilihan jawaban yang tepat adalah A

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