Question

Dua buah muatan listrik sejenis masing² besarnya 3.10^-9C dan 5.10^-9V terpisah sejauh 15 cm. k= 9.10^-9Nm/C². Berapa kah kuat medan listrik pada muatan besarnya 5.10^-9 C?

Answer 1

Q = 5 × 10^-9 C
k = 9 × 10^9 Nm²/c²
r = 15 cm = 1,5 × 10^-1

E = k × q ÷ r²
= 9 × 10^9 Nm²/c² × 5 × 10^-9 C ÷ (1,5 × 10^-1m)²
= 9 × 10^9 Nm²/c²× 5 × 10^-9 C ÷ 2,25 × 10^-2 m²
= 9 × 10^9 × 5 × 10^-7 ÷ 2,25 N/c
= 20 × 10^9 × 10^-7 N/c
= 20 × 10² N/c
= 2 × 10³ N/c = 2000 N/c