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Pertanyaan

Perhatikan gambar berikut!

Kuat medan listrik pada titik C sebesar ....

  1. begin mathsize 14px style 5 comma 0 cross times 10 to the power of 9 space straight N divided by straight C end style 

  2. begin mathsize 14px style 2 comma 3 cross times 10 to the power of 10 space straight N divided by straight C end style 

  3. begin mathsize 14px style 2 comma 7 cross times 10 to the power of 10 space straight N divided by straight C end style 

  4. begin mathsize 14px style 3 comma 1 cross times 10 to the power of 10 space straight N divided by straight C end style 

  5. begin mathsize 14px style 4 comma 0 cross times 10 to the power of 10 space straight N divided by straight C end style 

D. Kusumawardhani

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah D. 

Pembahasan

Diketahui:

begin mathsize 14px style q subscript A equals 4 space straight C q subscript B equals 3 space straight C r subscript A C end subscript equals 3 space straight m r subscript B C end subscript equals 1 space straight m end style 

Ditanya:
Kuat medan listrik pada titik C?


Gambar medan-medan listrik yang muncul pada titik C.

Maka, medan listrik pada titik C dapat dihitung dengan

begin mathsize 14px style E subscript C equals E subscript A plus E subscript B E subscript C equals k q subscript A over r subscript A squared plus k q subscript B over r subscript B squared E subscript C equals left parenthesis 9 cross times 10 to the power of 9 right parenthesis open parentheses 4 over 3 squared close parentheses plus left parenthesis 9 cross times 10 to the power of 9 right parenthesis open parentheses 3 over 1 squared close parentheses E subscript C equals left parenthesis 9 cross times 10 to the power of 9 right parenthesis open parentheses 4 over 9 close parentheses plus left parenthesis 9 cross times 10 to the power of 9 right parenthesis open parentheses 3 close parentheses E subscript C equals left parenthesis 4 cross times 10 to the power of 9 right parenthesis plus left parenthesis 27 cross times 10 to the power of 9 right parenthesis E subscript C equals 31 cross times 10 to the power of 9 space straight N divided by straight C E subscript C equals 3 comma 1 cross times 10 to the power of 10 space straight N divided by straight C end style  

Jadi, jawaban yang tepat adalah D. 

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