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Sebuah kawat dibentuk seperti gambar. Bila jari...

Sebuah kawat dibentuk seperti gambar.

Bila jari-jari lingkaran sebesar 5 cm dan begin mathsize 12px style μο space equals 4 straight pi cross times 10 to the power of negative 7 end exponent space Wb. straight A to the power of negative 1 end exponent straight m to the power of negative 1 end exponent end style, maka besar induksi magnetik di titik O adalah ....

  1. 0 comma 8 straight pi space cross times space 10 to the power of negative 5 end exponent space Wb. straight m to the power of negative 2 end exponent

  2. 1 comma 8 straight pi space cross times space 10 to the power of negative 5 end exponent space Wb. straight m to the power of negative 2 end exponent

  3. 2 comma 5 straight pi space cross times space 10 to the power of negative 5 end exponent space Wb. straight m to the power of negative 2 end exponent

  4. 3 comma 0 straight pi space cross times space 10 to the power of negative 5 end exponent space Wb. straight m to the power of negative 2 end exponent

  5. 4 comma 0 straight pi space cross times space 10 to the power of negative 5 end exponent space Wb. straight m to the power of negative 2 end exponent

Jawaban:

straight I space equals space 4 space straight A  straight a space equals space 5 space cm equals 0 comma 05 space straight m

Maka besarnya induksi magnetik di titik O adalah :

straight B space equals fraction numerator 180 degree over denominator open parentheses 360 degree close parentheses end fraction cross times fraction numerator μο. straight I over denominator 2 straight a end fraction  straight B space equals 1 half cross times fraction numerator open parentheses 4 straight pi cross times 10 to the power of negative 7 end exponent close parentheses open parentheses 4 close parentheses over denominator open parentheses 2 close parentheses open parentheses 5 cross times 10 to the power of negative 2 end exponent close parentheses end fraction  straight B space equals space 0 comma 8 straight pi cross times 10 to the power of negative 5 end exponent space straight T

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