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Questions and Answers
What is the formula to calculate the electric field intensity?
What is the formula to calculate the electric field intensity?
- E = (Q / k * r^2)
- E = (r^2 / k) * Q
- E = (k * r^2) / Q
- E = k * (Q / r^2) (correct)
In which direction does an electric field point around a positive point charge?
In which direction does an electric field point around a positive point charge?
- Perpendicular to the charge
- Toward the charge
- Away from the charge (correct)
- Parallel to the charge
What happens to the electric field between two parallel plates when the distance between the plates increases?
What happens to the electric field between two parallel plates when the distance between the plates increases?
- The electric field strengthens
- The electric field remains unchanged
- The electric field weakens (correct)
- The electric field becomes zero
What is the SI unit of electric field strength?
What is the SI unit of electric field strength?
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What happens to the electric field strength when the distance from a point charge is doubled?
What happens to the electric field strength when the distance from a point charge is doubled?
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In which direction does the electric field point around a negative point charge?
In which direction does the electric field point around a negative point charge?
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Study Notes
Electric Field Intensity
- The formula to calculate the electric field intensity is not provided, but it is commonly denoted as E and measured in units of Newtons per Coulomb (N/C).
Electric Field Direction
- Around a positive point charge, the electric field points radially outward from the charge.
- Around a negative point charge, the electric field points radially inward towards the charge.
Electric Field Between Parallel Plates
- When the distance between two parallel plates increases, the electric field between the plates decreases.
Electric Field Strength
- The SI unit of electric field strength is Newtons per Coulomb (N/C).
- When the distance from a point charge is doubled, the electric field strength decreases by a factor of four (1/4).
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