Electric Fields and Equipotential Lines

The video tutorial covers equipotential lines and surfaces, explaining that no work is required to move a charge along these lines due to the constant electric potential. It calculates the work needed for a proton and an electron to move between points with different potentials, highlighting the positive and negative work done. The tutorial also explains how to calculate voltage differences and the direction of the electric field, emphasizing that the field is perpendicular to equipotential lines and moves from high to low potential.

What is the work required to move a charge along an equipotential line?

• Negative, because the charge loses energy.

• Depends on the charge's magnitude.

• Positive, because the charge gains energy.

• Zero, because there is no potential difference.

What is the formula to calculate work done when moving a charge between two potentials?

• W = q * V

• W = -q * ΔV

• W = q * ΔV

• W = q / ΔV

When moving a proton from a high to a low potential, what is the nature of the work done?

• Zero, as there is no potential difference.

• Depends on the distance moved.

• Positive, as the proton gains energy.

• Negative, as the proton loses energy.

What is the work done on an electron moving from a high potential to a low potential?

• Zero, as there is no potential difference.

• Negative, as the electron loses energy.

• Positive, as the electron gains energy.

• Depends on the electron's speed.

How does the direction of movement affect the voltage between two points?

• It doesn't affect the voltage.

• Voltage is always negative.

• Voltage is always positive.

• Voltage can be positive or negative depending on direction.

What is the direction of the electric field relative to equipotential lines?

• Parallel to the lines.

• Perpendicular to the lines.

• At a 45-degree angle to the lines.

• Randomly oriented.

In which direction does the electric field travel?

• From high potential to low potential.

• From low potential to high potential.

• It doesn't have a specific direction.

• In a circular path.

How is the magnitude of the electric field calculated between two equipotential lines?

• By multiplying the potential difference by the distance.

• By adding the potential difference to the distance.

• By dividing the potential difference by the distance.

• By subtracting the distance from the potential difference.

What is the potential difference between two points if the electric field is 50 volts per meter and the distance is 4 meters?

• 200 volts

• 25 volts

• 50 volts

• 100 volts

Which of the following is true about the electric field between two equipotential lines?

• It is always in the negative y direction.

• It is always perpendicular to the lines.

• It is always zero.

• It is always parallel to the lines.