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Name: nileena
Status: student
Age: 16
Location: N/A
Country: N/A
Date: 1999 


Question:
What are some differences between electric fields and magnetic fields, as well as electric fields and gravity fields? Similarities?


Replies:
All fields are represented by arrows showing the direction of the field at a given point. If we connect these arrows tip to tail, we form field lines. Field lines do not cross. Electric field lines begin on positive and end on negative charges. Magnetic field lines are closed loops that have no beginning or end. Both electric and magnetic fields show attraction and repulsion. Gravitational fields only attract. The field lines point toward the central massive object.

---Nathan A. Unterman



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