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Dua benda masing-masing bermuatan listrik  dan  pa...

Dua benda masing-masing bermuatan listrik begin mathsize 14px style 8 space cross times space 10 to the power of negative 6 end exponent space straight C end style dan begin mathsize 14px style 9 space cross times space 10 to the power of negative 6 end exponent space straight C end style pada jarak 3 cm. Tentukanlah :

A. Besar gaya Coulomb (F)

B. Kuat medan (E) dimuatan uji begin mathsize 14px style 8 space cross times space 10 to the power of negative 6 end exponent space straight C end style 

  1. F = 180 N dan Ebegin mathsize 14px style 3 comma 5 space cross times space 10 to the power of 7 space straight N divided by straight C end style 

  2. F = 720 N/C dan Ebegin mathsize 14px style 9 space cross times space 10 to the power of 20 space straight N end style  

  3. F = 180 N/C dan Ebegin mathsize 14px style 3 comma 5 space cross times space 10 to the power of 7 space straight C end style 

  4. F = 720 N dan Ebegin mathsize 14px style 9 space cross times space 10 to the power of 7 space straight N divided by straight C end style 

Jawaban:

A. Gaya Coulomb yang terjadi pada kedua muatan :

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell F space end cell equals cell space k space fraction numerator q subscript 1 space q subscript 2 over denominator r squared end fraction end cell row cell F space end cell equals cell space open parentheses 9 space cross times space 10 to the power of 9 close parentheses space fraction numerator open parentheses 8 space cross times space 10 to the power of negative 6 end exponent space straight C close parentheses space open parentheses 9 space cross times space 10 to the power of negative 6 end exponent space straight C close parentheses over denominator open parentheses 3 space cross times space 10 to the power of negative 2 end exponent close parentheses squared end fraction end cell row cell F space end cell equals cell space open parentheses 9 space cross times space 10 to the power of 9 close parentheses space fraction numerator 72 space cross times space 10 to the power of negative 12 end exponent space straight C over denominator open parentheses 3 space cross times space 10 to the power of negative 2 end exponent close parentheses squared end fraction end cell row cell F space end cell equals cell space bold 720 bold space bold N end cell end table end style 


B. Kuat Medan listrik

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell E space end cell equals cell space k space q over r squared end cell row cell E space end cell equals cell space open parentheses 9 space cross times space 10 to the power of 9 close parentheses space fraction numerator 9 space cross times space 10 to the power of negative 6 end exponent space straight C over denominator open parentheses 3 space cross times space 10 to the power of negative 2 end exponent close parentheses squared end fraction end cell row cell E space end cell equals cell space bold 9 bold space bold cross times bold space bold 10 to the power of bold 7 bold space bold N bold divided by bold C end cell end table end style 


Jadi, jawaban yang tepat adalah D.

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