1. Diketahui
q1 = 20mC = 20 x 10^-3 = 2 x 10^-4
r = 10 cm = 1 x 10^-1
Ditanya : E = ?
Jawab :
E = k q1 / r^2
E = (9 x 10^9) x ( 2 x 10^-4) / (10^-1)^2
E = 18 x 10^5 / 10^-2
E = 18 x 10^7 N/C
2. Diketahui
q1 = 8 mC = 8 x 10^-3
r = 4 cm = 1 x 10^-2
Ditanya : E = ?
Jawab :
E = k q1 / r^2
E = (9 x 10^9) x ( 8 x 10^-3) / (4 x 10^-2)^2
E = (72 x 10^6) / (16 x 10^-4)
E = 4,5 x 10^10 N/C