Electric Potential and Field Concepts

Which statement accurately describes the electric field at points A and B between two parallel, oppositely charged plates?

• The electric field at A is stronger than at B, and both point upwards.

• The electric field at B is stronger than at A, and both point upwards.

• The electric fields at A and B have the same magnitude and both point upwards.

• The electric fields at A and B have the same magnitude, but A points upwards and B points downwards.

A proton of mass mp is released from rest just above the lower plate and reaches the top plate with speed vp. An electron of mass me is released from rest just below the upper plate. What is the speed of the electron (ve) when it reaches the bottom plate, in terms of vp, mp, and me?

• ve = vp * sqrt(mp / me)

• ve = vp * (mp / me)

• ve = vp * sqrt(me / mp)

• ve = vp * (me / mp)

What happens to the electric potential difference between two charged parallel plates if they are moved farther apart while maintaining the same net charge on each plate?

• The electric potential difference decreases.

• The electric potential difference increases.

• The electric potential difference remains the same.

• The electric potential difference becomes zero.