Electric Fields and Potential Concepts

What geological feature is used as an analogy to understand electric charge and electric fields?

• Volcanic craters

• Topographic maps

• Oceanic trenches

• Glacial valleys

In a uniform electric field between two parallel plates, how is the electric field strength (E) determined from the voltage (ΔV) and the displacement (Δr)?

• E = ΔV * Δr

• E = ΔV + Δr

• E = ΔV / Δr

• E = Δr / ΔV

An electric field is established between two parallel plates. If the voltage difference across the plates is 1.5 V and the plates are separated by 5.0 cm, what is the magnitude of the electric field strength?

• 0.3 V/m

• 3.0 V/m

• 30 V/m

• 300 V/m

What is the change in electric potential when a charge moves along an equipotential line?

• It increases proportionally to the distance moved.

• It decreases proportionally to the distance moved.

• It remains zero.

• It depends on the direction of the electric field.