1. What is Electric Field?

The electric field at a point is defined as the electric force per unit charge experienced by a test charge placed at that point. It describes how charged particles interact with each other in space.

2. How Does the Calculator Work?

The calculator uses the electric field equation:

Where:

• \( E \) — Electric field (N/C)
• \( F \) — Force experienced by charge (N)
• \( q \) — Test charge (C)

Explanation: The equation shows that electric field strength is directly proportional to the force and inversely proportional to the test charge.

3. Importance of Electric Field Calculation

Details: Calculating electric fields is fundamental in electromagnetism, helping understand forces between charges, capacitor design, and electromagnetic wave propagation.

4. Using the Calculator

Tips: Enter force in newtons (N) and charge in coulombs (C). Charge must be greater than zero. The calculator will output electric field in N/C.

5. Frequently Asked Questions (FAQ)

Q1: What is the direction of electric field?
A: The electric field direction is the direction a positive test charge would move when placed in the field.

Q2: What are typical electric field values?
A: Near Earth's surface: ~100 N/C downward. Inside wires: ~0.01 N/C. Near charged objects: can be thousands of N/C.

Q3: How does electric field relate to voltage?
A: Electric field is the negative gradient of electric potential (voltage). In uniform fields: E = V/d.

Q4: What if my charge is negative?
A: The calculator uses absolute value of charge. The direction would be opposite to the force direction for negative charges.

Q5: Can this be used for point charges?
A: For point charges, use Coulomb's Law: E = kQ/r² where k is Coulomb's constant, Q is source charge, r is distance.