Electric Field and Forces Quiz

Which of the following statements about electric field lines is true?

• Electric field lines can cross each other.

• Electric field lines start on positive charges and end on negative charges.

• Electric field lines form closed loops.

• Electric field lines are always straight.

Which of the following is a characteristic of equipotential surfaces in a uniform electric field?

• They are concentric circles.

• They are parallel planes.

• They are radial lines.

• They are elliptical.

According to the superposition principle, the net electric field at a point due to multiple charges is:

• The sum of the magnitudes of the individual fields.

• The vector sum of the individual fields.

• The product of the magnitudes of the individual fields.

• The difference of the magnitudes of the individual fields.

Which of the following statements about equipotential surfaces is correct?

• Equipotential surfaces are always parallel to electric field lines.

• Equipotential surfaces are perpendicular to electric field lines.

• Equipotential surfaces can intersect each other.

• Equipotential surfaces are always spherical.

What happens to the electric field strength if the distance from a point charge is doubled?

• It remains the same.

• It doubles.

• It is halved.

• It is reduced to a quarter.

If two point charges are placed close to each other, the electric field at a point due to these charges is determined by:

• The charge with the larger magnitude.

• The charge with the smaller magnitude.

• The vector sum of the fields due to each charge.

• The average of the fields due to each charge.

The electric field strength at a point is zero. What can be inferred about the forces on a test charge placed at that point?

• The test charge will experience a maximum force.

• The test charge will experience no force.

• The test charge will experience a force in the direction of the nearest charge.

• The test charge will experience a force opposite to the nearest charge.

Which of the following is true for the electric field between two equal and opposite point charges?

• The field is strongest at the midpoint between the charges.

• The field is zero at the midpoint between the charges.

• The field lines are parallel to each other.

• The field lines form closed loops.