Electric Potential for AP Physics C: Electricity and Magnetism

The video reviews electric potential in AP Physics C, covering electrostatic forces, potential energy, electric fields, and the concept of electric potential. It explains the relationship between electric fields and potential energy, introduces the electron volt, and discusses equipotential surfaces and lines. The video also covers electric dipoles and continuous charge distributions, emphasizing the scalar nature of electric potential and its calculation.

What equation relates the electrostatic force to the potential energy in the x-direction?

• Force in the x-direction equals the negative of the derivative of potential energy with respect to x-position.

• Force in the x-direction equals the product of potential energy and x-position.

• Force in the x-direction equals the sum of potential energy and x-position.

• Force in the x-direction equals the integral of potential energy with respect to x-position.

How does the electric potential energy of a positive charge change when it moves opposite to the direction of the electric field?

• It remains the same.

• It becomes zero.

• It decreases.

• It increases.

What is an electron volt (eV)?

• The potential difference experienced by an electron.

• The charge of an electron.

• The energy gained or lost when a charge of magnitude e moves through a potential difference of 1 volt.

• The force experienced by an electron in an electric field.

What happens to the speed of a proton released from the inside surface of plate A right before it runs into plate B?

• It becomes zero.

• It decreases.

• It increases.

• It remains the same.

What is the unit of electric potential?

• Watts per second

• Newtons per meter

• Joules per coulomb or volts

• Coulombs per second

What is the relationship between electric potential difference and electric potential energy?

• Electric potential difference equals the sum of electric potential energy and charge.

• Electric potential difference equals the integral of electric potential energy with respect to charge.

• Electric potential difference equals the product of electric potential energy and charge.

• Electric potential difference equals change in electric potential energy divided by charge.

What is an equipotential surface?

• A surface with no electric potential.

• A surface with the same electric field at every point.

• A surface with varying electric potential at different points.

• A surface with the same electric potential at every point.

How are equipotential lines oriented relative to electric field lines?

• Randomly

• At a 45-degree angle

• Parallel

• Perpendicular

What is the equation for the electric potential caused by a point charge?

• Coulomb constant times charge divided by the square of the distance from the center of the point charge to the location of the electric potential.

• Coulomb constant times charge divided by the cube of the distance from the center of the point charge to the location of the electric potential.

• Coulomb constant times charge squared divided by the distance from the center of the point charge to the location of the electric potential.

• Coulomb constant times charge divided by the distance from the center of the point charge to the location of the electric potential.

What is the relationship between electric potential and electric potential energy?

• Electric potential energy equals the square of electric potential.

• Electric potential energy equals electric potential divided by charge.

• Electric potential energy equals charge times electric potential.

• Electric potential energy equals the integral of electric potential with respect to charge.