Topic 1 : Electrostatics (2nd hour)

1. Electric potential, V is defined as the work done by external force per unit charge to bring a test charge ( positive charge ) from infinity (∞) to a point in an electric field produced by a source point charge, Q.

• True
• False

2. All the following statements are the properties of equipotential surfaces except

• The electric field points in the direction of decreasing electric potential.
• The surfaces are closer together where the electric field is stronger, and farther apart where the field is weaker
• The electric field at every point on an equipotential surface is parallel to the surface
• No two equipotential surfaces can intersect each other

3. Which one of the following is a vector quantity?

     I   Electric field

     II  Electric force

     III Electric potential

• A. I, II, III

• B. II, III

• C. I, II

• D. II only

4. Angle between equipotential surface and lines of force is

• 0
• 90
• 180
• 45

5. Electric Potential (voltage) is greatest at point...

• A

• B

6. Which of the following points is or are equipotential to point X?

• A & C
• A
• C
• B & D

7. In the diagram below, which arrow indicates the correct direction of the electric field lines

• A

• B

• C

• D

8. If an electron were placed between the two plates, at which point would it have the greatest electrical potential energy?

• A

• C

• E

• All the same

9. Which description best describes electric potential difference?

• The amount of energy that a charge has.
• The amount of energy needed to move a charge from 1 place to another
• The amount of charge that an electron has.
• The amount of brightness you observe when looking at a lightbulb.

10. Electric potential difference is measured in

• newtons (N)
• ampere (A)
• volts (V)
• joules (J)