Electric Forces and Energy Dynamics

What is the formula for the electric force between two point charges?

Which of the following statements is true about electric fields?

• Electric fields are scalar quantities.

• Electric fields are vector quantities.

• Electric fields have no direction.

• Electric fields are always negative.

How does the electric field affect the potential energy of a charge?

• The potential energy increases as the charge moves in the direction of the electric field.

• The potential energy decreases as the charge moves in the direction of the electric field.

• The potential energy remains constant regardless of the electric field.

• The potential energy is always zero in an electric field.

What is the relationship between electric potential energy and electric potential?

• U = qV

• U = q+V

• U = q-V

• Electric potential energy is independent of electric potential.

Which of the following expressions represents the kinetic energy of a charge in an electric field?

If a positive charge is released from rest in a uniform electric field, what will happen to its kinetic energy?

• The kinetic energy will decrease.

• The kinetic energy will increase.

• The kinetic energy will remain constant.

• The kinetic energy will become zero.

What is the unit of electric field strength?

• Newton (N)

• Volt (V)

• Newton per Coulomb (N/C)

• Joule (J)

How does the electric force between two charges change if the distance between them is doubled?

• The electric force doubles.

• The electric force is halved.

• The electric force is quartered.

• The electric force remains the same.