Electric Fields —
1. Write the definition and formula of the electric field. _____________________________________________
E = = =
E: _____________________________ unit: __________
Fe: ____________________________ unit: __________
k: _____________________________ unit: __________
Q: _____________________________ unit: __________
q: _____________________________ unit: __________
r: _____________________________ unit: __________
2. What is the magnitude of the electric field strength when an electron experiences a 5.0 N force?
3. What are the magnitude and direction of the electric field 1.5 m away from a negative charge of 2.1x10 –9 C?
4. There is a negative charged particle of 0.32 C in the free space. (a) What are the magnitude and direction of the electric field 2.0 m away from the particle? (b) What are the magnitude and direction of the electric force when an electron is placed 2.0 m away from this particle?
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The strength of an electric field E at any point may be defined as the electric, or Coulomb, force F exerted per unit positive electric charge q at that point, or simply E = F/q. ... Because positive charges repel each other, the electric field around an isolated positive charge is oriented radially outward.
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