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If the electric potential at a point is increased, what happens to the work done

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Question: If the electric potential at a point is increased, what happens to the work done by an external force on a positive charge moved to that point?

Options:

  1. Increases
  2. Decreases
  3. Remains constant
  4. Cannot be determined

Correct Answer: Increases

Solution: 

If the electric potential increases, the work done by the external force must increase to move the positive charge against the electric field.

If the electric potential at a point is increased, what happens to the work done

Practice Questions

Q1
If the electric potential at a point is increased, what happens to the work done by an external force on a positive charge moved to that point?
  1. Increases
  2. Decreases
  3. Remains constant
  4. Cannot be determined

Questions & Step-by-Step Solutions

If the electric potential at a point is increased, what happens to the work done by an external force on a positive charge moved to that point?
Correct Answer: Work done by the external force increases.
  • Step 1: Understand what electric potential means. It is the amount of work needed to move a positive charge to a point in an electric field.
  • Step 2: Recognize that when electric potential increases, it means that more work is required to move a positive charge to that point.
  • Step 3: Realize that an external force is needed to move the charge against the electric field. This external force does work on the charge.
  • Step 4: Conclude that if the electric potential increases, the external force must do more work to move the positive charge to that point.
  • Electric Potential – Electric potential is the amount of electric potential energy per unit charge at a point in an electric field.
  • Work Done by External Force – The work done by an external force is the energy required to move a charge against the electric field.
  • Relationship Between Potential and Work – As electric potential increases, more work is required to move a positive charge to that point against the electric field.
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