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Questions and Answers
What does Coulomb's law provide?
What does Coulomb's law provide?
- The direction of an electric field
- The magnitude of electrostatic force between two charges (correct)
- The speed of light
- The nature of electric charge
What is the formula for the electric field?
What is the formula for the electric field?
E = k(q/r^2)
The concept of ________ lines indicates that closer lines represent stronger fields, while farther lines represent weaker fields.
The concept of ________ lines indicates that closer lines represent stronger fields, while farther lines represent weaker fields.
field
What is Coulomb's constant (k)?
What is Coulomb's constant (k)?
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The permittivity of free space (E0) is approximately ________.
The permittivity of free space (E0) is approximately ________.
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Study Notes
Coulomb's Law
- Describes the electrostatic force between two charges (q1 and q2).
- The force magnitude depends on the distance (r) between the charges.
- Coulomb's constant (k) is a key factor: k = 1/(4πε₀) = 8.99 x 10⁹ N·m²/C².
- Vacuum permittivity (ε₀) is approximately 8.85 x 10⁻¹² F/m.
Electric Field
- Defined by the equation E = k(q/r²).
- Electric field strength (E) increases with charge (q) and decreases with the square of the distance (r).
Field Lines
- Visual representation of electric fields.
- Proximity of field lines indicates strength: closer lines signify a stronger field, while farther lines indicate a weaker field.
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