Equipotential Surfaces

The video tutorial explores electric potential difference in uniform fields, including calculations when moving at an angle. It explains equipotential lines and surfaces, their properties, and their relation to electric fields. The tutorial also covers electric dipoles, their potential, and how to calculate electric potential energy for point charges using the Coulomb constant.

What is the electric potential difference when moving at an angle to a uniform electric field?

• It is zero.

• It is equal to the electric field times the cosine of the angle.

• It is equal to the electric field times the distance.

• It is equal to the negative of the electric field times the distance.

What is true about equipotential surfaces?

• They are parallel to electric fields.

• They are perpendicular to electric fields.

• They have varying electric potential at different points.

• They require work to move a charge along them.

How do equipotential lines around a positive point charge differ from those around a negative point charge?

• They are perpendicular to each other.

• They are identical in shape but differ in value.

• Positive charges have positive equipotential lines, while negative charges have negative equipotential lines.

• They are identical in shape and value.

What is an electric dipole?

• Two charges of equal magnitude but opposite sign.

• A charge with no electric field.

• Two charges of equal magnitude and same sign.

• A single charge with a large magnitude.

How is the electric potential caused by a point charge calculated?

• By multiplying the charge by the distance.

• By dividing the charge by the distance.

• By multiplying the Coulomb constant by the charge and dividing by the distance.

• By adding the charge and the distance.

What is the principle used to determine electric potential for multiple charges?

• Superposition

• Conservation of energy

• Newton's third law

• Ohm's law

What does the electric potential energy of two point charges depend on?

• The difference in their charges

• The square of the distance between them

• The product of their charges and the distance between them

• The sum of their charges