Electric Fields and Forces Quiz

A field where the field lines are parallel and evenly spaced. This indicates a consistent field strength across the area.

A field where the field lines are not parallel and the spacing between them varies. This means the field strength is not constant throughout.

An intrinsic property of objects that produces electric fields and interacts with other charges.

A region of space where a charged object experiences an electric force.

The strength of an electric field at a point, measured in Newtons per Coulomb (N/C).

A small, positive test charge used to determine the electric field strength at a point by measuring the force experienced by the test charge.

The force per unit mass or force per unit charge, depending on the type of field, and usually represented as a vector.

A charge that creates an electric field and affects other charges within its field.

The force exerted on a charged particle in an electric field is directly proportional to the strength of the field and the magnitude of the charge.

If the particle has a positive charge, the force and acceleration are in the same direction as the electric field. However, if the particle has a negative charge, the force and acceleration are opposite to the direction of the electric field.

A capacitor is a device that stores electrical energy by accumulating charges on its plates.

The capacitance of a capacitor is a measure of its ability to store electrical charge. It is defined as the ratio of the charge stored to the voltage across the capacitor.

A charged capacitor stores electrical potential energy, which is the energy that is stored due to the separation of charges.

Capacitors are widely used in various electrical circuits and devices.

The electric field at a point due to a continuous charge distribution is the vector sum of the electric fields due to each infinitesimal charge element in the distribution.

A line charge density represents the charge per unit length of a line of charge. It is often denoted by λ (lambda) and measured in Coulombs per meter (C/m).

The electric field due to a charged rod can be calculated by integrating the contributions from each small segment of the rod. The result is the total electric field at a point.

The electric field due to a charged rod decreases as the distance from the rod increases. The field strength is also dependent on the charge distribution along the rod.

A uniform electric field is a region where the electric field strength is constant in both magnitude and direction. This means the field lines are parallel and evenly spaced.

The force on a charged particle in a uniform electric field is given by F = qE, where q is the charge and E is the electric field strength. This force causes the particle to accelerate.

The acceleration of a charged particle in a uniform electric field is given by a = qE/m, where q is the charge, E is the electric field strength, and m is the mass of the particle.

If the electric field is uniform, the acceleration of a charged particle is constant, and the particle will move in a straight line. The direction of the acceleration will depend on the sign of the charge.

A measure of a capacitor's ability to store electric charge. It is defined as the ratio of the charge stored on the capacitor to the voltage applied across it.

The SI unit of capacitance, named after Michael Faraday. It represents a relatively large amount of capacitance.

The charge stored on a capacitor is directly proportional to the voltage applied across it, with capacitance serving as the proportionality constant.

The space between the plates of a parallel-plate capacitor. It affects capacitance, with a larger distance resulting in a lower capacitance.

A material's ability to store electrical energy. Air's permittivity is signified by ε. It influences the capacitance of a parallel-plate capacitor.

The surface area of each plate in a parallel-plate capacitor. It directly affects capacitance, with a larger area leading to a greater capacitance.

The formula that relates capacitance, permittivity, plate area, and plate separation for a parallel-plate capacitor.

The potential difference between two points in an electric field. For a uniform field, it equals the electric field strength multiplied by the distance between those points.

A combination of capacitors where each capacitor has the same amount of charge across their plates, but the voltage across each capacitor may be different. The total capacitance is always less than the smallest individual capacitance.

A combination of capacitors where the voltage across each capacitor is the same, but the charge on each capacitor may be different. The total capacitance is the sum of individual capacitances.

The overall capacitance of a series or parallel combination of capacitors.

The reciprocal of the equivalent capacitance of capacitors connected in series is equal to the sum of the reciprocals of the individual capacitances.

The equivalent capacitance of capacitors connected in parallel is equal to the sum of the individual capacitances.

A circuit that involves a resistor (R) and a capacitor (C) connected to a voltage source.

When a capacitor is charging in an RC circuit, the voltage across the capacitor increases exponentially over time until it reaches the voltage of the source.

When a capacitor is discharging in an RC circuit, the voltage across the capacitor decreases exponentially over time until it reaches zero.

The net movement of electric charge, measured in Amperes (A), where 1 A equals 1 Coulomb per second (C/s).

The direction of flow of positive charges, although in reality, electrons, which are negatively charged, move in the opposite direction.

The opposition to the flow of electric current in a material, measured in Ohms (W), where 1 W equals 1 Volt per Ampere (V/A).

A fundamental law stating that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it, with the constant of proportionality being the resistance (R).

A material that follows Ohm's Law, meaning its resistance remains constant regardless of the applied voltage.

The intrinsic property of a material that determines its resistance to electric current flow. It depends on the material's composition and temperature.

The temperature dependence of resistivity, where the resistivity of most metals increases linearly with temperature.

A state where the resistance of a material abruptly drops to zero at very low temperatures, allowing for current to flow without any opposition.