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Coulomb's Law quantifies the electrostatic force between two charged particles. It states that the force is proportional to the product of the charges and inversely proportional to the square of the distance between them.
공식
The calculator applies F = k × |q₁ × q₂| / r² where k is Coulomb\'s constant
- F
- k × |q₁ × q₂| / r² where k is Coulomb\'s constant — k × |q₁ × q₂| / r² where k is Coulomb\'s constant
단계별 가이드
- 1Input the magnitudes of two electric charges and the distance between them
- 2The calculator applies F = k × |q₁ × q₂| / r² where k is Coulomb's constant
- 3Results show the electrostatic force in Newtons
풀어진 예시
입력
q₁ = 2 μC, q₂ = 3 μC, r = 0.5 m
결과
F ≈ 0.216 N
Using k = 8.99 × 10⁹ N·m²/C²
피해야 할 일반적인 실수
- ✕Forgetting to square the distance in the denominator
- ✕Using distance in centimeters instead of meters, which affects calculation accuracy
자주 묻는 질문
Why does force decrease with distance squared?
The electric field spreads spherically in three-dimensional space, so its strength decreases with the inverse square of distance.
Can this law handle opposite charges?
Yes, opposite charges experience attractive force (negative) while like charges experience repulsive force (positive).
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