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Tiga muatan listrik identik ditempatkan seperti pa...

Tiga muatan listrik identik ditempatkan seperti pada gambar berikut.

Jika besar begin mathsize 14px style q subscript 1 equals q subscript 2 equals q subscript 3 equals q end style, resultan gaya listrik yang dialami muatan begin mathsize 14px style q subscript 1 end style adalah...undefined 

  1. begin mathsize 14px style fraction numerator k space q over denominator r end fraction end style 

  2. begin mathsize 14px style fraction numerator k space q over denominator r end fraction square root of 2 end style 

  3. begin mathsize 14px style fraction numerator k space q squared over denominator r squared end fraction square root of 2 end style 

  4. begin mathsize 14px style fraction numerator k squared space q squared over denominator r squared end fraction square root of 2 end style 

  5. begin mathsize 14px style fraction numerator k squared space q to the power of 4 over denominator r to the power of 4 end fraction square root of 2 end style 

Jawaban:

Karena muatan dan jaraknya sama, maka:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell F subscript 12 end cell equals cell F subscript 13 equals fraction numerator k q squared over denominator r squared end fraction end cell row R equals cell square root of F subscript 12 squared plus F subscript 13 squared end root end cell row blank equals cell fraction numerator k q squared over denominator r squared end fraction square root of 2 end cell row blank blank blank end table end style

Jawaban benar C

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