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Why should the charged body be regarded as a point charge when calculating the field strength? Is it because of Coulomb's law? E = KQ / r2
It is easy to calculate, and the force direction of a point is better determined. If there is volume and the charge distribution is disordered, it is difficult to determine the force direction of the electric field
RELATED INFORMATIONS
- 1. What is the definition of Coulomb's law?
- 2. On the derivation of Coulomb's law It is said in the book that Coulomb's electric pendulum experiment is more powerful than the torsion pendulum experiment in proving the inverse square law, but how Coulomb deduces the relationship between Coulomb force and R through the relationship between the pendulum period T and the distance r between two charge spheres? It is best to list the relevant derivation formula, thank you!
- 3. Two identical spherical conductors, suspended at the same point by thin insulated wires of 13 cm in length, have the same amount of charge (can be regarded as point charge). Due to electrostatic repulsion, the distance between them is 10 cm. The mass of each spherical conductor has been measured to be 0.6 g, and the amount of charge they carry is calculated. (known electrostatic constant k = 9 × 109 n · m2 / C2)
- 4. Tangent length theorem
- 5. What is the tangent length theorem?
- 6. Tangent length theorem 1. In the trapezoid ABCD, ad ‖ BC, ∠ ABC = 90 ° the semicircle o with ab as diameter cuts CD at point M. if the trapezoid has an area of 10 square centimeters and a perimeter of 14cm, what is the radius of semicircle o? 2. The side length of square ABCD is a, AE cuts the semicircle with diameter BC to e, intersects DC to F, and finds CF: FD
- 7. How to express the tangent length theorem
- 8. Narrate and prove the tangent length theorem
- 9. The meaning of MC element symbol It's a scientific element symbol. MC means that kind of element (for example, O is oxygen, etc.)
- 10. What does the MC symbol on the thermometer stand for
- 11. There is a point charge in vacuum, and the charge quantity is Q. according to Coulomb's law and the definition of electric field strength, the expression of electric field strength at the point where q is R is derived
- 12. Lim ┬ (n →∞) &; ((1 / (n ^ 2 + 1)] + 2 / (n ^ 2 + 2) + &; n / (n ^ 2 + n)) is equal to 1 / 2,
- 13. The base of natural logarithm Don't give me a definition. What's the use of E? Many formulas are the simplest. Why?
- 14. Given that a and B satisfy b > a > e, where e is the base of natural logarithm, a ^ b > b ^ A is proved A ^ b > b ^ a B (LNA) > A (LNB) can you explain it?
- 15. 10. Let a > 0, b > 0, e be the base of natural logarithm 10. Let a > 0, b > 0 and E be the base of natural logarithm A. If EA + 2A = EB + 3b, then a > B B. If EA + 2A = EB + 3b, then a < B C. If ea-2a = eb-3b, then a > B D. If ea-2a = eb-3b, then a < B A B after e is the index
- 16. Where does the base e of natural logarithm come from?
- 17. Mathcad draw logarithmic image, log can't add base. What should I do
- 18. The larger the base of logarithm, the farther away the function image is from the positive direction of Y axis What is the meaning of "the farther away the function image is from the positive direction of y-axis"?
- 19. Natural logarithm e accurate to 100, how to get out!
- 20. What is the natural logarithm e approximately equal to? Can there be 10 decimal places? two point seven one eight four eight two point seven one eight two eight one eight two eight four five nine Which is right?