如何计算Electric Field
learn.whatIsHeading
Electric field strength measures the electric force per unit charge at a location. It's fundamental to electrostatics and electromagnet behavior.
公式
The calculator applies E = kQ / r² for single charge, superposition for multiple
- E
- kQ / r² for single charge — kQ / r² for single charge
分步指南
- 1Enter the source charge and distance, or use field from multiple charges
- 2The calculator applies E = kQ / r² for single charge, superposition for multiple
- 3Results show electric field magnitude and direction
例题解析
输入
Q = 1 μC, r = 1 m
结果
E ≈ 8,990 V/m
Using k = 8.99 × 10⁹ N·m²/C²
常见错误注意事项
- ✕Forgetting to square the distance
- ✕Confusing electric field with electric potential
常见问题
Is electric field direction standardized?
By convention, electric field lines point away from positive charges and toward negative charges.
How do you combine multiple electric fields?
Use vector superposition; add field vectors from all sources, accounting for direction.
准备好计算了吗？尝试免费的 Electric Field 计算器
自己尝试一下 →