Electric Potential Energy Sem1 Exam review

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What is electric potential energy?

Back

Electric potential energy is the energy a charged particle possesses due to its position in an electric field. It is defined as the work done to move a charge from a reference point to a specific point in the field.

Front

What is the relationship between electric potential (V) and electric potential energy (U)?

Back

The electric potential (V) at a point is defined as the electric potential energy (U) per unit charge (q) at that point: V = U/q.

Front

How does the kinetic energy of a charged particle relate to the potential difference it is accelerated through?

Back

The kinetic energy (K) gained by a charged particle when accelerated through a potential difference (V) is given by K = qV, where q is the charge of the particle.

Front

What happens to the kinetic energy of a particle if its charge is doubled and mass is halved while being accelerated through the same potential difference?

Back

The kinetic energy becomes 2K, as the kinetic energy is proportional to the charge.

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What is the formula for calculating electric potential due to a point charge?

Back

The electric potential (V) due to a point charge (Q) at a distance (r) is given by V = kQ/r, where k is Coulomb's constant.

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What is an equipotential surface?

Back

An equipotential surface is a surface on which the electric potential is the same at every point. No work is done when moving a charge along this surface.

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What is the significance of the electric field (E) in relation to electric potential (V)?

Back

The electric field (E) is the negative gradient of the electric potential (V): E = -dV/dr. It indicates the direction and magnitude of the force on a charge.

Front

How do you calculate the electric field between two parallel plates?

Back

The electric field (E) between two parallel plates is calculated using E = V/d, where V is the potential difference and d is the distance between the plates.

Front

What is the potential difference between two points in an electric field?

Back

The potential difference (V) between two points is the work done per unit charge in moving a charge between those points.

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What is the principle of superposition in electric potential?

Back

The principle of superposition states that the total electric potential at a point due to multiple charges is the algebraic sum of the potentials due to each charge individually.