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If the electric potential at a point is 150 V and the electric field is directed

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Question: If the electric potential at a point is 150 V and the electric field is directed towards the point, what can be said about the charge creating the field?

Options:

  1. It is positive
  2. It is negative
  3. It is neutral
  4. Cannot be determined

Correct Answer: It is negative

Solution: 

If the electric field is directed towards the point, it indicates that the charge creating the field is negative.

If the electric potential at a point is 150 V and the electric field is directed

Practice Questions

Q1
If the electric potential at a point is 150 V and the electric field is directed towards the point, what can be said about the charge creating the field?
  1. It is positive
  2. It is negative
  3. It is neutral
  4. Cannot be determined

Questions & Step-by-Step Solutions

If the electric potential at a point is 150 V and the electric field is directed towards the point, what can be said about the charge creating the field?
  • Step 1: Understand that electric potential (measured in volts) indicates the amount of electric potential energy per unit charge at a point.
  • Step 2: Recognize that electric field lines point away from positive charges and towards negative charges.
  • Step 3: Note that if the electric field is directed towards the point where the potential is 150 V, it means the field is coming from a charge.
  • Step 4: Conclude that since the electric field is directed towards the point, the charge creating the field must be negative.
  • Electric Potential and Electric Field Relationship – The relationship between electric potential and electric field direction indicates the nature of the charge creating the field.
  • Charge Polarity – Understanding that a negative charge creates an electric field that points towards it, while a positive charge creates a field that points away.
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