Define electric potential.
The work done per unit charge in bringing a charge from infinity to a point in an electric field.
True or false: Electric potential is measured in volts.
TRUE
Fill in the blank: The unit of capacitance is ______.
Farad
What does a capacitor do?
Stores electrical energy in an electric field.
Define capacitance.
The ability of a system to store charge per unit potential difference.
What is the formula for capacitance?
C = Q/V, where C is capacitance, Q is charge, and V is voltage.
True or false: Capacitors can only store positive charge.
FALSE
Capacitors can store both positive and negative charges.
What is a parallel plate capacitor?
A capacitor consisting of two parallel conductive plates separated by an insulating material.
Fill in the blank: The dielectric constant is a measure of a material’s ability to ______.
reduce the electric field
What effect does a dielectric have on capacitance?
It increases the capacitance by reducing the electric field strength.
Define energy stored in a capacitor.
The energy stored is given by the formula U = 1/2 CV^2.
True or false: The energy stored in a capacitor increases with voltage.
TRUE
What is the relationship between charge and voltage in a capacitor?
Charge is directly proportional to voltage.
Fill in the blank: In a series circuit, the total capacitance is ______.
less than the smallest capacitor
What happens to capacitance in a parallel circuit?
The total capacitance is the sum of individual capacitances.
Define equipotential surfaces.
Surfaces where the electric potential is the same at every point.
True or false: Electric field lines are always perpendicular to equipotential surfaces.
TRUE
What is the potential difference?
The difference in electric potential between two points.
Fill in the blank: A capacitor’s plates are typically made of ______.
conductive materials
What is self-capacitance?
The capacitance of a single conductor with respect to infinity.
Define voltage source.
A device that provides a constant potential difference, such as a battery.
True or false: The electric potential is higher near positive charges.
TRUE
What is the effect of temperature on capacitance?
Capacitance can change with temperature due to material properties.
Fill in the blank: The energy density in an electric field is given by ______.
1/2 εE^2
