How it works
Radial electric field = kq/r² with k ≈ 8.9875517923×10⁹ N·m²/C². Positive is radially outward.
Input definitions
- Source charge (C)
- Enter the value in the labeled unit.
- Distance from source (m)
- Enter the value in the labeled unit.
A worked example
- Source charge (C)
- 0.000001
- Distance from source (m)
- 1
Assumptions & limits
Ideal educational model in the stated SI units. Real equipment, structural design and safety decisions need appropriate professional analysis; losses are excluded unless entered.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-18. Content checked against the stated method and examples. Our verification approach.
Common questions
Is this valid inside a conducting object?
Not generally. It describes a point charge in vacuum, or a spherically symmetric external field under suitable conditions.
How does Electric field from a point charge work?
Radial electric field = kq/r² with k ≈ 8.9875517923×10⁹ N·m²/C². Positive is radially outward.
What should I check before using Electric field from a point charge?
Ideal educational model in the stated SI units. Real equipment, structural design and safety decisions need appropriate professional analysis; losses are excluded unless entered.