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Electric Field Equation:
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The electric field equation \( E = \frac{k \cdot q}{r^2} \) calculates the electric field strength at a point in space due to a point charge. It represents the force per unit charge experienced by a test charge placed at that point.
The calculator uses the electric field equation:
Where:
Explanation: The equation shows that electric field strength is directly proportional to the charge and inversely proportional to the square of the distance from the charge.
Details: Electric field calculations are fundamental in electromagnetism, helping understand how charges interact, design electrical systems, and analyze electromagnetic phenomena in various applications.
Tips: Enter the charge value in Coulombs and distance in meters. Distance must be greater than zero. The calculator uses Coulomb's constant value of 8.99×10^9 N·m²/C².
Q1: What is Coulomb's constant?
A: Coulomb's constant (k) is approximately 8.99×10^9 N·m²/C² and represents the proportionality constant in Coulomb's law.
Q2: Does the equation work for both positive and negative charges?
A: Yes, the magnitude calculation is the same. The direction (sign) indicates whether the field points away from (positive) or toward (negative) the charge.
Q3: What are typical electric field values?
A: Electric field strengths vary widely - from few N/C in weak fields to millions of N/C in strong fields near charged objects.
Q4: Can this calculator handle multiple charges?
A: This calculator is designed for single point charges. For multiple charges, vector addition of individual fields is required.
Q5: What units should I use?
A: Use Coulombs for charge and meters for distance to get results in Newtons per Coulomb (N/C).