W jakiej odleglosci od siebie nalezy umiescic dwa ladunki dodatnie o wartosci 1uC kazdy, aby odpychaly sie z sila 10N?
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F=k*q₁*q₂/r²
q₁=q₂=q
r²=k*q²/F
k=9*10⁹
q=1µC=1*10⁻⁶
r²=9*10⁹ * 10⁻⁶ * 10⁻⁶ * 10⁻¹
r²=0,0009
r= 0,03m
r=3cm
dane:
q1 = q2 = q = 1uC = 10^-6 C
F = 10 N
k = 9 *10^9 N*m2/C2
szukane:
r = ?
F = k *q1q2/r^2 I*r^2
F * r^2 = k *q1q2 /:F
r^2 = k *q1q2/F
r^2 = k*q^2/F
r^2 = 9*10^9N*m2/C2 *(10^-6C)^2 /10N
r = V0,0009 m2
r = 0,03 m
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