Calculating work done in moving charges, electric fields

• What does ΔV represent in the work done formula?

  The potential difference in volts
• What is another term for potential difference?

  Voltage
• What is work done (W) in the context of electric fields?

  Energy transferred when moving a charge
• What is the relationship between work done, charge, and potential difference?

  • Work done (W) is directly proportional to:
  • Charge (q)
  • Potential difference (ΔV)
  • Formula: W = qΔV
• If the positive charge was moved further away from the negative charge, how would the electric field lines change?

  • The electric field lines would become more spread out and less concentrated
  • The strength of the electric field would decrease as the distance between the charges increases
• What is the unit of charge?

  Coulombs (C)
• What happens to electric potential when the field points downwards?

  Potential decreases as you move down
• What is the formula to calculate work done when moving a charge?

  W = qΔV
• How is work done related to electric potential energy?

  It equals the change in electric potential energy
• What happens to work done if the charge is doubled while keeping potential difference constant?

  Work done also doubles
• How is work done related to charge and potential difference?

  Work done is directly proportional to both
• What are the key physical quantities in electric fields?

  • Charge (q): measured in coulombs (C)
  • Electric Field (E): force per unit charge
  • Potential Difference (ΔV): voltage difference
  • Work Done (W): energy transferred, W = qΔV
• If a charge of 2 C moves through a potential difference of 5 V, what is the work done?

  10 J
• What does potential difference represent?

  Energy required to move a unit charge
• How does the symmetry of the electric field lines in this image relate to the properties of the charges?

  • The symmetry of the field lines indicates that the charges are of equal magnitude
  • The radial pattern of the field lines is characteristic of a point charge configuration
• What does *q* represent in the work done formula?

  The amount of charge in coulombs
• What happens to work done if the potential difference is halved while keeping charge constant?

  Work done is also halved
• What analogy is used to explain work done when moving a charge?

  Pushing a ball uphill
• If the positive charge was moved closer to the negative charge, how would the electric field lines change?

  The field lines would become more concentrated
• What are the steps to calculate work done in an electric field?

  1. Identify potential difference (ΔV)
  2. Apply the formula: W = qΔV
  3. Interpret the result
• What formula is used to calculate work done in an electric field?

  W = qΔV
• What is potential difference (ΔV)?

  Difference in voltage between two points
• How is electric field strength described in relation to potential?

  As the "slope" of electric potential landscape
• How does the radial pattern of the electric field lines relate to the properties of point charges?

  The radial pattern indicates the charges are point charges
• What is the relationship between the positive and negative charges in the image?

  • The positive and negative charges are opposites and are attracting each other
  • The arrows represent the electric field lines between the charges
• What do the red and blue circles represent in the image?

  • The red circle represents a positive charge
  • The blue circle represents a negative charge
• What does a negative work done indicate in this context?

  Energy is released by the charge
• What happens to potential energy when a positive charge is moved to a higher electric potential?

  It increases, requiring work
• What is defined as work done in moving a charge in an electric field?

  Energy transferred to the charge
• What is the potential difference (ΔV) when moving from positive to negative?

  ΔV = -10 V
• What does the electric field (E) represent?

  Force per unit charge in the field
• What is the work done when moving a +2 C charge with ΔV = -10 V?

  -20 J
• What is the relationship between electric potential and electric field?

  • Electric potential is like height on a hill
  • Electric field is like the slope of the hill
  • Steeper slope means greater change in potential
  • Downward field indicates decreasing potential
• What is the charge being moved in the calculation?

  +2 C
• What do the black arrows in the image represent?

  Electric field lines
• What does *W* represent in the work done formula?

  The work done in joules
• Why are the electric field lines more concentrated between the positive and negative charges?

  Because opposite charges attract each other