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Flashcards on Electric Field in Matter
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What is an electric field?
A region around a charged object where a force is exerted on other charged objects
What is the SI unit of electric field?
N/C (Newton per Coulomb)
Is the electric field a vector or scalar quantity?
Vector
What is the formula to calculate the electric field generated by a point charge?
Electric field (E) = Force (F) / Charge (q)
What happens to the electric field when the distance from a point charge increases?
The electric field decreases with the square of the distance
What is the electric field inside a conductor in electrostatic equilibrium?
Zero
How does the presence of a dielectric material affect the electric field between charged plates of a capacitor?
The electric field strength decreases
What is the electric field inside a capacitor?
Non-zero, but constant
What is the significance of equipotential surfaces in electric fields?
They represent surfaces where the electric potential is the same
What is the relationship between electric field and electric potential?
Electric field (E) is the negative gradient of electric potential (V)
Why do charges experience a force in an electric field?
Charges experience a force due to the interaction between their own electric field and the electric field created by other charges
In which direction does the electric field point for a positive point charge?
Away from the charge
In which direction does the electric field point for a negative point charge?
Toward the charge
What is the relationship between electric field strength and electric potential gradient?
Electric field strength is proportional to the electric potential gradient
How does the electric field vary around a uniformly charged sphere?
The electric field is stronger near the surface and weaker at larger distances
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Test Your Knowledge
The electric field is a ______ quantity.
scalar
vector
magnitude
none of the above
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What is the SI unit of electric field?
N/m
N/C
J/C
J/m
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What is the formula to calculate electric field?
Force (F) * Charge (q)
Acceleration (a) / Mass (m)
Force (F) / Charge (q)
Mass (m) * Acceleration (a)
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What happens to the electric field as the distance from a point charge increases?
It decreases
It increases
It remains constant
It becomes zero
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What is the electric field inside a conductor in electrostatic equilibrium?
Zero
Non-zero but constant
Increasing
Decreasing
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What is the relationship between electric field and electric potential?
Electric field (E) = Electric potential (V)
Electric field (E) = -dV/ds
Electric field (E) = dV/ds
There is no relationship
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What is the direction of the electric field for a positive point charge?
Away from the charge
Toward the charge
Parallel to the charge
Perpendicular to the charge
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What is the direction of the electric field for a negative point charge?
Away from the charge
Toward the charge
Parallel to the charge
Perpendicular to the charge
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What is the relationship between electric field strength and electric potential gradient?
They are proportional
They are inversely proportional
There is no relationship
They are equal
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What does an equipotential surface represent?
Regions of maximum electric field
Surfaces where electric potential is the same
Locations of minimum electric potential
Regions of zero electric field
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